Since the college football offseason, we have ranked everything from the weakest position groups to the biggest question marks. This week, using the ESPN College Football Power Rankings as our guide, we answer this question: Which true freshman has had the biggest impact so far on each of the top 25 teams?

Jalen Hurts

Hurts wasn't supposed to be in the quarterback conversation, let alone the starter. Now the dual-threat athlete from Texas is the first true freshman in more than 30 years to begin a game under center at Alabama. Through two weeks of play, he has completed 61 percent of his passes for four touchdowns and one interception. -- Alex Scarborough

Ricky Aguayo

Florida State had the No. 1 class, thanks to a five-star signee, a top-two quarterback and 16 ESPN 300 recruits, but its biggest contributor so far is kicker Aguayo. He's a perfect 7-for-7 on field goals, and in his debut, he kicked three fourth-quarter field goals to put the Ole Miss win on ice -- which Aguayo let everyone know runs through his veins. -- Jared Shanker

Michael Jordan

The most recent true freshman to start the season opener on the offensive line for Ohio State? Just some guy named Orlando Pace. That's a Hall of Fame standard for Jordan to try to reach, and while there's no reason to start working on a bronze bust yet, he's already making a mark in the trenches. After using his strength and maturity to make an early claim to a starting job, Jordan figures to hold onto it for a while. -- Austin Ward

Ed Oliver

There is no question that Oliver has been the guy for the Cougars. A five-star recruit, Oliver was expected to have an instant impact, and he did, recording seven tackles and two sacks in the Cougars' 33-23 upset win over Oklahoma on Sept. 3. Oliver earned a starting job at defensive tackle coming out of training camp and will be a surefire freshman All-American candidate. -- Sam Khan Jr.

Dexter Lawrence

It isn't that anyone doubted Lawrence's ability before the season. He was Clemson's top recruit and an imposing force in the middle of the defensive line. But just how quickly Lawrence has made his presence felt is impressive. In the opener against Auburn, he was constantly in the backfield, and he recorded seven tackles, a sack and a pass breakup. In last week's action against Troy, he again tallied seven tackles, including 1.5 for a loss. Through two weeks, Lawrence is tied with North Carolina's Nazair Jones for the most tackles by an ACC interior lineman. -- David M. Hale

Chris Evans

Two games into his college career, Evans has more than twice as many rushing yards as anyone else on the Wolverines' roster. His speed provides a good complement to the power of senior starter De'Veon Smith and should give him opportunities to contribute throughout the season. -- Dan Murphy

Nate Herbig

It's tough for a true freshman to see significant playing time in David Shaw's program -- even Christian McCaffrey didn't get many touches two years ago. But Stanford is excited about 350-pound Herbig, and they used him as one of their extra offensive lineman against Kansas State (the Cardinal fittingly call this the 'Ogre' position). Herbig was in on McCaffrey's game-sealing 41-yard touchdown run, as he used his big frame to do some bulldozing on the right side. -- David Lombardi

Nick Harris

Harris has worked his way into the Huskies' offensive line rotation, despite the fact that eight other Washington players came into this season with starting experience. Harris didn't come into Seattle with a ton of fanfare; he held offers from (besides UW) only Cal Poly and New Hampshire. However, Chris Petersen has been very impressed by his motor and physicality at guard. -- Chantel Jennings

Anthony Lotti

Lotti is the only true freshman listed as a starter on Wisconsin's depth chart. He battled P.J. Rosowski for the spot and earned his first two punt attempts in Week 2 against Akron, averaging 37.5 yards. His second try didn't have enough hang time and was returned for a touchdown. Still, the coaching staff thinks highly of Lotti, a specialist who earned a scholarship out of high school. -- Jesse Temple

Mason King

It's a little tough to pick out an exceptional freshman on one of the country's most experienced teams. Not a single first-year player appears on the Cardinals' two-deep, and besides King, the punter, no redshirt freshman is a starter. So far this season, freshmen -- redshirt or otherwise -- have accounted for just 30 yards of offense and 12 tackles, so King wins by default. He has punted seven times for an average of 41.4 yards, which hasn't mattered all that much, given the points put up by red-hot QB Lamar Jackson. -- Hale

Shane Buechele

The Longhorns' six-year search for their next great quarterback might finally be over. Buechele has been confident and efficient in his first two starts, completing 71.7 percent of his passes and guiding Texas' new-look offense to 91 points in its first two games. The kid throws a mean deep ball too and isn't afraid to take hits in the run game. -- Max Olson

Tyler Byrd

The Vols haven't had a lot of contributions from freshmen yet. The one to keep an eye on is Byrd, who through two games has one catch for 5 yards. However, the former No. 1-rated high school athlete has a chance to make a big impact on an offense still searching for a more consistent passing game. Byrd could be used all over the place on offense. -- Edward Aschoff

Mike Panasiuk

Donnie Corley might be the new name you hear most in East Lansing, but Panasiuk could provide an important layer of depth in the middle of the Spartan defensive line and could allow star lineman Malik McDowell to line up on the edge as a pass-rusher more often. -- Dan Murphy

Colton Prater

Prater won the starting job at left guard coming out of training camp and has given the Aggies a pair of solid performances right out of the gate, which have helped stabilize a position where the Aggies shuffled players in 2015. Prater is part of a young trio on the Aggies' interior offensive line; the team is starting a true freshman (Prater), a redshirt freshman (center Erik McCoy) and a true sophomore (right guard Connor Lanfear). -- Khan

Parrish Cobb

With Dakota Austin struggling in Week 1 in Houston, the Sooners inserted Cobb into the starting lineup at cornerback in Week 2. With a big performance this week against Ohio State, Cobb will have a great chance to keep the starting gig indefinitely. -- Jake Trotter

Kevin Stepherson

Stepherson turned some heads this spring when he enrolled, and he has made the most of his early opportunities among a young receiving corps, including catching three passes for 35 yards and a touchdown Saturday in a win over Nevada. -- Matt Fortuna

Keith Duncan

Duncan is a walk-on from Matthews, North Carolina, who emerged as one of the surprises of fall camp. He edged redshirt sophomores Mick Ellis and Miguel Recinos for the starting kicking job and has been perfect through two weeks. He's 12-for-12 on extra points and drilled his only field goal try, a 22-yarder in the season opener against Miami (Ohio). Eight true freshmen were listed on Iowa's initial two-deep this season, but the other seven were backups. --Temple

Jacob Eason

Georgia has a couple good options. Running back Brian Herrien (15 carries, 106 yards, one touchdown) has been one of the feel-good stories of the Bulldogs' first two games, and David Marshall (five tackles, one sack, one pass breakup) has already made some noise on the defensive line. But the only real option here is the obvious one. Eason (19-for-32, 335 yards, two touchdowns, one interception) made his first career start last weekend against Nicholls State and will probably make his first true road appearance against Missouri on Saturday. -- David Ching

Benito Jones

There are a handful of options here. A.J. Brown has already caught a touchdown. Greg Little is earning reps at left tackle. But Jones has been the most consistent and most impressive freshman to this point. In the season opener against Florida State, the former ESPN 300 star had four tackles, including 1.5 tackles for loss. He followed that with five tackles against Wofford on Saturday. Jones might not be starting yet, but Ole Miss can't keep him off the field. -- Greg Ostendorf

Michael Divinity

LSU has already played a dozen true freshmen, but nobody has made a massive impact to date. Divinity probably gets the nod here after handling extensive playing time at the "F" outside linebacker spot in the opener against Wisconsin, in which he notched four tackles and a stop for a 6-yard loss. However, Divinity did not play as much last week against Jacksonville State, with the Tigers relying heavily on a nickel defense, which does not feature Divinity's position, against the Gamecocks' spread offense. -- Ching

Troy Dye

The linebacker was named the Pac-12's Week 1 defensive player of the week after he recorded 11 tackles (including 4.5 TFL and one sack) during the Ducks' season-opening win over UC Davis. Last weekend, he followed that performance with six tackles in Oregon's win over Virginia. He's currently tied for third in the Pac-12 for tackles after two weeks and is one of only two freshmen in the top 40 in the conference. -- Jennings

Zach Smith

The Bears lost much of the star power from their recruiting class this summer. Receiver Denzel Mims earned a start last week against SMU, but none of 13 true freshmen who played can match the impact of Smith, whose presence allows the Baylor coaches to feel decent about their depth behind Seth Russell. An ESPN 300 prospect a year ago, Smith has completed five of eight throws for 60 yards. -- Mitch Sherman

McTelvin Agim

The Arkansas coaching staff knew they were getting a good one when Agim signed with the Razorbacks. He was ranked No. 11 overall in the ESPN 300. Through the first two games, he has already made an impact. The 6-foot-3, 289-pound freshman recorded two tackles in his first college game, and he doubled that total this past Saturday, when he collected four tackles and his first career sack in the double-overtime win at TCU. This is just a glimpse of how good Agim can be. -- Ostendorf

Jawaan Taylor

After starting in Florida's season opener against UMass, Taylor came in and replaced starting right tackle Fred Johnson and played very well on the outside. Taylor struggled at right tackle in his debut but shined in Week 2 by keeping quarterback Luke Del Rio's right side pretty clean in Florida's blowout win over Kentucky. Whether he starts or not, Taylor is a solid option at right tackle for the Gators. -- Aschoff

Brandon Stephens

Throughout training camp, it seemed like three running backs were in the mix for the starting job -- Soso Jamabo, Bolu Olorunfunmi and Nate Starks -- but a fourth, Stephens, ranks second on the team with 71 yards rushing through two games. He didn't get a carry in the opener against Texas A&M but was an obvious bright spot against UNLV on Saturday. -- Kyle Bonagura