Every offseason, several teams make the decision to go in a new direction by making a change at head coach. In 2012, five teams -- the Rams, Buccaneers, Jaguars, Colts and Dolphins -- fired their head coaches. We also have 15 new coaches at the all-important offensive coordinator position.

To get everyone back up to speed, here's a team-by-team review of the coaching staff along with some key pass/rush statistics from the 2011 season. These changes are vitally important to fantasy football owners and lay a solid foundation in preparing for the 2012 fantasy football season.

Arizona Cardinals

HC Ken Whisenhunt starts his 6th year. OC Mike Miller coaches the offense with help from assistant HC and offensive line coach Russ Grimm. Team coaching staff has significant ties to the Bill Cowher Steelers teams.

2011 Pass/Rush: 58.6%/41.4% - Pass/Rush TDs: 21/12 - Yds/Catch: 12.9 - Yds/Rush: 4.2

Atlanta Falcons

HC Mike Smith is entering his 5th season with the Falcons . Smith has led the Falcons to four straight winning records and playoff appearances in 2008, 2010 and 2011. OC Dirk Koetter replaces Mike Mularkey. Koetter was the OC in Jacksonville for the last five years. The Jaguars were middle of the pack in both total yards and scoring in 2009 and 2010 before a disastrous 2011 with rookie QB Blaine Gabbert under center.

2011 Pass/Rush: 56.7%/43.3% - Pass/Rush TDs: 29/14 - Yds/Catch: 12.0 - Yds/Rush: 4.0

Baltimore Ravens

HC John Harbaugh enters his 5th season as the lead man in Baltimore. Harbaugh worked for Eagles HC Andy Reid and has led the Ravens to the playoffs in each of his four seasons as HC. OC Cam Cameron is a proven NFL OC who is largely in control of the team's offensive play calling.

2011 Pass/Rush: 54.2%/45.8% - Pass/Rush TDs: 21/15 - Yds/Catch: 11.6 - Yds/Rush: 4.3

Buffalo Bills

HC Chan Gailey enters his 3rd season as a head coach in Buffalo. Gailey was hired for his offensive mind and has held various OC jobs in the past. OC Curtis Modkins enters his 3rd year in the position and is also the RB coach.

2011 Pass/Rush: 59.6%/40.4% - Pass/Rush TDs: 24/12 - Yds/Catch: 10.8 - Yds/Rush: 4.9

Carolina Panthers

Kellen Winslow & HC Ron Rivera enters his 2nd season as head coach of the Panthers after successful stints as defensive coordinator for the Bears and Chargers . OC Rob Chudzinski came over in 2010 with Rivera from San Diego. Under his leadership, and with the addition of QB Cam Newton , the Panthers finished 7th in total yards and 5th in scoring in 2011 after finishing last in both categories in 2010. It should be noted that Chudzinski served as the Browns OC in 2007 when Derek Anderson Braylon Edwards all posted career-best numbers.

2011 Pass/Rush: 53.9%/46.1% - Pass/Rush TDs: 21/26 - Yds/Catch: 13.1 - Yds/Rush: 5.4

Chicago Bears

HC Lovie Smith is a veteran coach in his 8th year with the Bears . Lovie got himself off the hot seat in 2010 with an NFC North title, but a so-so year in 2011 has him on shaky ground. OC Mike Tice takes over for Mike Martz, who resigned after the 2010 season. Tice was the head coach of the Vikings from 2002-2005 (32-32), where in 2002, 2003 and 2004, they finished in the top 8 in scoring and top 4 in yards behind a potent passing game that featured Dante Culpepper and Randy Moss . The offense took a nosedive in 2005 when Brad Johnson took over at QB. This will be the first time he will serve as an offensive coordinator.

2011 Pass/Rush: 50.9%/49.1% - Pass/Rush TDs: 18/10 - Yds/Catch: 12.5 - Yds/Rush: 4.4

Cincinnati Bengals

HC Marvin Lewis enters his 9th season with the Bengals , after getting off the hot seat in 2010 with a 9-7 record and a playoff berth. OC Jay Gruden enters his 2nd season calling plays for the Bengals . Under Gruden's guidance, and despite rookie QB Andy Dalton taking over for Carson Palmer , the Bengals improved from 22nd in scoring in 2010 to finish 18th in 2011.

2011 Pass/Rush: 54.0%/46.0% - Pass/Rush TDs: 21/10 - Yds/Catch: 11.4 - Yds/Rush: 3.9

Cleveland Browns

HC Pat Shurmur enters his 2nd season with the Browns . Shurmur called the plays in 2011 and will continue to do so in 2012 even though GM Mike Holmgren hired OC Brad Childress to coach the offense in 2012. Childress did not call plays while in Philadelphia, but did as the head coach for the Vikings in 2006. The team improved its scoring average for four consecutive seasons, culminating with a #2 ranking with Brett Favre under center in 2009. Under Shurmur, the Browns finished #30 in scoring and #29 in total yards in 2011.

2011 Pass/Rush: 57.9%/42.1% - Pass/Rush TDs: 16/4 - Yds/Catch: 10.3 - Yds/Rush: 3.7

Dallas Cowboys

HC Jason Garrett enters his second season as the lead man in Dallas, and will once again call the plays despite the addition of OC Bill Callahan, who will assist Garrett and coach the offensive line. The Cowboys were #15 in scoring and #11 in yards in 2011.

2011 Pass/Rush: 58.3%/41.7% - Pass/Rush TDs: 33/5 - Yds/Catch: 11.8 - Yds/Rush: 4.4

Denver Broncos

HC John Fox is in his second season as the head honcho in Denver. He traditionally opts for a run-heavy, conservative approach, but that's going to change with the addition of QB Peyton Manning . OC Mike McCoy remains as the team's play-caller and has a long history with Fox, having spent six years with him as QB coach in Carolina.

2011 Pass/Rush: 44.1%/55.9% - Pass/Rush TDs: 20/11 - Yds/Catch: 12.5 - Yds/Rush: 4.8

Detroit Lions

HC Jim Schwartz enters his 4th season as the head coach in Detroit and is mainly focused on the defense. OC Scott Linehan remains as the team's play-caller. The Lions were #4 in scoring and #5 in yardage in 2011, and were the most pass-happy team in the NFL with a 65/35 run/pass ratio.

2011 Pass/Rush: 65.2%/34.8% - Pass/Rush TDs: 41/9 - Yds/Catch: 12.0 - Yds/Rush: 4.3

Green Bay Packers

HC Mike McCarthy is in his 7th year as the head coach and the team's primary play-caller. Expect the powerful offensive attack to continue. New OC Tom Clements replaces Joe Philbin, but there's no doubt that this is McCarthy's offense.

2011 Pass/Rush: 58.3%/41.7% - Pass/Rush TDs: 51/11 - Yds/Catch: 13.7 - Yds/Rush: 4.0

Houston Texans

HC Gary Kubiak is in his 7th season as the Texans ' head man. He has a heavy hand in the offense and still calls the plays on offense with input from OC Rick Dennison, who enters his 3rd year with the team. Both men came from the same Mike Shanahan-led system in Denver.

2011 Pass/Rush: 46.1%/53.9% - Pass/Rush TDs: 20/18 - Yds/Catch: 12.8 - Yds/Rush: 4.5

Indianapolis Colts

HC Chuck Pagano takes over for Jim Caldwell, who was fired after the 2011 season. Pagano was the defensive coordinator for the Baltimore Ravens in 2011 after coaching the secondary for three seasons. OC Bruce Arians comes over from Pittsburgh where he served as OC for the last four seasons. Overall, the Steelers were mediocre in points and yardage during his reign.

2011 Pass/Rush: 58.3%/41.7% - Pass/Rush TDs: 14/8 - Yds/Catch: 10.7 - Yds/Rush: 4.2

Jacksonville Jaguars

HC Mike Mularkey takes over the reins after the Jaguars fired Jack Del Rio. Mularkey was the OC in Atlanta for the last four years, and was the OC in Miami in 2006 before being demoted to TE coach in 2007. He was the head coach for the Bills from 2004 to 2005, amassing a 14-21 record. OC Bob Bratkowski will reportedly call the plays for the Jaguars . He was the OC for the Bengals from 2001 to 2010. The offense peaked from 2005 to 2007, finishing in the top 11 in both points and yards for three consecutive seasons before losing QB Carson Palmer for the 2008 season.

2011 Pass/Rush: 49.1%/50.9% - Pass/Rush TDs: 12/9 - Yds/Catch: 10.5 - Yds/Rush: 4.0

Kansas City Chiefs

HC Romeo Crennel took over for Todd Haley, who was fired after a 5-8 start in 2011. He was the head coach for the Browns from 2005-2008 (24-40). He was the Chiefs ' defensive coordinator before becoming head coach. He still runs the defense. OC Brian Daboll replaces Bill Muir, who retired earlier this year. Daboll has ties with Crennel and GM Scott Pioli from their days in New England. He was the OC in Cleveland in 2009 and 2010, and the team finished near the bottom of the league in both points scored and total yards during his tenure. He then became the Dolphins OC in 2011; Miami improved from #30 in points scored in 2010 to #22 in 2011. The Dolphins were very balanced in terms of rush/pass.

2011 Pass/Rush: 51.0%/49.0% - Pass/Rush TDs: 13/4 - Yds/Catch: 11.0 - Yds/Rush: 3.9

Miami Dolphins

HC Joe Philbin takes over for Tony Sparano, who was fired after four seasons with the Dolphins . Philbin was the OC for the Packers , though he didn't call the plays in Green Bay. The newly-hired OC Mike Sherman spent six years as the head coach of the Packers ; his teams finished in the top 6 in points scored four times in that span. He served as the Texans OC for two seasons before becoming the head coach for Texas A&M. He spent four years at A&M and coached the Dolphins ' first round draft pick, QB Ryan Tannehill , for his entire college career. Tannehill comes to Miami already very familiar with Sherman's version of the West Coast offense.

2011 Pass/Rush: 50.1%/49.9% - Pass/Rush TDs: 20/11 - Yds/Catch: 12.2 - Yds/Rush: 4.2

Minnesota Vikings

HC Leslie Frazier enters his 2nd full season as the lead man in Minnesota. He was formerly the team's defensive coordinator. OC Bill Musgrave is in his 2nd year; he led the Vikings to a 10-spot (#29 to #19) improvement in points scored despite rookie Christian Ponder taking over at QB.

2011 Pass/Rush: 53.3%/46.7% - Pass/Rush TDs: 20/18 - Yds/Catch: 11.4 - Yds/Rush: 5.2

New England Patriots

HC Bill Belichick is in his 13th season as the Patriots ' head coach and is a great defensive mind. OC Josh McDaniels replaces Bill O'Brien as the team's offensive coordinator/QB coach, and will handle the playcalling duties. During his run from 2005 to 2008 as the Patriots ' de facto OC, the team finished in the top 10 in points scored for four consecutive seasons. He spent the 2009 season and part of the 2010 season as the HC for the Broncos . He then served as OC for the Rams in 2011. His offenses have not had much success outside of New England, but then again, he was working with QBs like Kyle Orton and Sam Bradford instead of Tom Brady . He should pick up where he left off in 2008.

2011 Pass/Rush: 58.3%/41.7% - Pass/Rush TDs: 39/18 - Yds/Catch: 13.1 - Yds/Rush: 4.0

New Orleans Saints

Linebackers coach Joe Vitt takes over as interim HC for Sean Payton, who has been suspended for the year as part of the Saints ' bounty scandal. Vitt himself is suspended for the first six games of the season, so O-line coach Aaron Kromer will fill in while Vitt is out. OC Pete Carmichael is entering his 4th season with the Saints and took over playcalling duties when Sean Payton injured his leg in the middle of 2011. He continued to call the plays for the rest of the season and postseason.

2011 Pass/Rush: 60.6%/39.4% - Pass/Rush TDs: 46/16 - Yds/Catch: 11.7 - Yds/Rush: 4.9

New York Giants

HC Tom Coughlin enters his 9th season with the Giants . OC Kevin Gilbride is in his 6th season running the Giants ' offense. Expect more of the same from the G-Men.

2011 Pass/Rush: 58.9%/41.1% - Pass/Rush TDs: 29/17 - Yds/Catch: 13.7 - Yds/Rush: 3.5

New York Jets

HC Rex Ryan is in his 4th year as head coach for the Jets after a disappointing 8-8 season in 2011. Ryan was the Ravens ' defensive coordinator for four seasons and is a great defensive mind. OC Tony Sparano joins the Jets after a three-plus year stint as the Dolphins ' head coach. He has a run-first mentality, which fits in with the Jets ' conservative approach.

2011 Pass/Rush: 55.3%/44.7% - Pass/Rush TDs: 26/14 - Yds/Catch: 11.4 - Yds/Rush: 3.8

Oakland Raiders

HC Dennis Allen is in his first year as the Raiders ' lead man. He's young (39), but has previous coaching experience with the Saints and Falcons , and was most recently the defensive coordinator for the Broncos in 2011. OC Greg Knapp was most recently the QB coach for the Texans , but was the OC in San Francisco (2001-2003), Atlanta (2004-2006), Oakland (2007-2008) and Seattle (2009). Knapp and Allen know each other from their days with the Falcons . In nine seasons as an OC, his offenses had an average ranking of #17 in points scored and #15 in total yards. He intends to install a run-first offense that is "explosive" in the passing game, but the plan is to go with a zone blocking system, which may negatively impact Darren McFadden in the running game.

2011 Pass/Rush: 52.8%/47.2% - Pass/Rush TDs: 19/16 - Yds/Catch: 13.0 - Yds/Rush: 4.5

Philadelphia Eagles

HC Andy Reid is in his 14th season with the Eagles . OC Marty Mornhinweg enters his 6th season as the team's offensive coordinator. Like Reid, Mornhinweg is another long-time disciple of the West Coast offensive system.

2011 Pass/Rush: 55.2%/44.8% - Pass/Rush TDs: 22/20 - Yds/Catch: 13.0 - Yds/Rush: 5.1

Pittsburgh Steelers

HC Mike Tomlin is in his 6th season running the Steelers and has enjoyed great success. OC Todd Haley joins the Steelers after being ousted as the Chiefs ' HC in the middle of the 2011 season. He ran the Cardinals ' offense in 2007 and 2008; those teams finished #7 and #3 in scoring, respectively. When he was the HC for the Chiefs , they improved from #23 in scoring in 2009 to #14 in in 2010.

2011 Pass/Rush: 55.3%/44.7% - Pass/Rush TDs: 21/13 - Yds/Catch: 12.6 - Yds/Rush: 4.4

San Diego Chargers

HC Norv Turner is in his 6th season with the Chargers , but has previously been the HC for the Redskins (1994-2000) and the Raiders (2004-2005). He calls the plays for the Chargers . OC Hal Hunter was promoted from offensive line coach to OC this season. Under Turner, the Chargers have had a top 5 scoring offense for five consecutive seasons.

2011 Pass/Rush: 57.3%/42.7% - Pass/Rush TDs: 27/16 - Yds/Catch: 12.6 - Yds/Rush: 4.3

Seattle Seahawks

HC Pete Carroll enters his 3rd season with the Seahawks after leaving USC with a decade of head coaching experience. OC Darrell Bevell is now in his second season after coming over from the Vikings . He has a West Coast background, but the Seahawks run more than most teams due to limitations at QB (though that may change if Matt Flynn is under center). Assistant HC Tom Cable and Marshawn Lynch helped to revitalize the rushing attack in 2011, and both return in 2012.

2011 Pass/Rush: 53.3%/46.7% - Pass/Rush TDs: 15/15 - Yds/Catch: 11.5 - Yds/Rush: 3.9

San Francisco 49ers

HC Jim Harbaugh is in his second season running the 49ers after a terrific rookie year where he guided his team to the NFC Championship Game. OC Greg Roman came over from Stanford with Harbaugh. Due to Alex Smith 's limitations at QB, the 49ers had the 3rd-most run-oriented offense in 2011, rushing the ball on 52.3% of their offensive plays. The team has stressed the receiver position this offense, and may open things up as their confidence in Smith grows.

2011 Pass/Rush: 47.7%/52.3% - Pass/Rush TDs: 18/14 - Yds/Catch: 11.5 - Yds/Rush: 4.1

St. Louis Rams

HC Jeff Fisher joins the Rams after a very long tenure as the Titans ' lead man. Prior to becoming Tennessee's head coach, he coached defense and will likely exercise a heavy hand on that side of the ball with new DC Gregg Williams suspended indefinitely due to the bounty scandal in New Orleans. OC Brian Shottenheimer comes over from the Jets after a rough 2011 as New York's offensive coordinator. In six seasons guiding the Jets ' offense, his teams had an average ranking of #16 in scoring and #21 in total yards gained. His offense is similar to the one the Rams utilized in Sam Bradford 's rookie season, and the QB is happy about it.

2011 Pass/Rush: 57.3%/42.7% - Pass/Rush TDs: 9/7 - Yds/Catch: 11.2 - Yds/Rush: 4.1

Tampa Bay Buccaneers

HC Greg Schiano takes over as head coach for the Buccaneers after a long stint as the HC at Rutgers. He has a defensive background. OC Mike Sullivan will run the offense after coaching the Giants wide receivers and QBs. Sullivan learned under Giants OC Kevin Gilbride, so expect a similar offensive attack.

2011 Pass/Rush: 63.0%/37.0% - Pass/Rush TDs: 17/9 - Yds/Catch: 10.5 - Yds/Rush: 4.2

Tennessee Titans

HC Mike Munchak is in his 2nd season as the Titans head coach after taking over for Jeff Fisher, with whom he worked for for 14 years. OC Chris Palmer enters his 2nd season as the Titans ' offensive coordinator. The Titans threw more than expected in 2012, but finished #21 in points scored and #17 in total yards. Palmer has 20 years of NFL experience developing QBs Eli Manning and Tony Romo among others, so he should be good for young QB Jake Locker

2011 Pass/Rush: 60.9%/39.1% - Pass/Rush TDs: 22/8 - Yds/Catch: 11.7 - Yds/Rush: 3.8

Washington Redskins

HC Mike Shannahan is in his 3rd season with the Redskins after a year out of coaching. Shannahan coached 12 years for the Broncos and is known for a run-heavy West Coast offense, although in 2010 and 2011 the Redskins were one of the pass-heaviest teams in the league. OC Kyle Shannahan enters his 3rd year with the Redskins and is the son of HC Mike Shannahan. Kyle runs a West Coast offense which is less run-oriented than his father's version, posting a 61%/39% split in 2011.

2011 Pass/Rush: 59.5%/40.5% - Pass/Rush TDs: 19/8 - Yds/Catch: 11.7 - Yds/Rush: 4.0