The UFC bantamweight championship is on the line for the first time in 11 months on Saturday when champion T.J. Dillashaw attempts to defend it against Renan Barao in UFC on FOX 16’s headliner.

The contest serves as a rematch after Dillashaw (11-2 MMA, 7-2 UFC) battered then-champ Barao (33-2 MMA, 8-1 UFC) for more than four rounds before scoring a fifth-round TKO to take the title at UFC 173 in May 2014.

More than a year has passed before the second meeting could materialize. It’s been scheduled twice before, but each fighter suffered an injury that ultimately delayed.

To go behind the numbers of the main event and the rest of the FOX-televised event at Chicago’s United Center, check out 45 pre-fight facts about UFC on FOX 16.

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Main event

Dillashaw returns to competition for the first time since Aug. 30, 2014. His 329-day layoff is the longest of a pro career dating back to March 2010.

Dillashaw is the only Team Alpha Male fighter to win a UFC title. The Sacramento-based camp otherwise is winless in eight UFC title bouts with Urijah Faber 0-3, Chad Mendes 0-3 and Joseph Benavidez 0-2.

Dillashaw is one of four contestants from “The Ultimate Fighter” reality series to win a UFC belt. He’s the lone fighter who did not win the show’s tournament to accomplish the feat.

Dillashaw is the only UFC champion to come from “TUF” to successfully defend his belt. Matt Serra, Forrest Griffin and Rashad Evans all failed to register a title defense during their reigns.

Dillashaw’s three-fight UFC winning streak in bantamweight competition is tied for the second longest active streak in the division behind Raphael Assuncao (seven).

Dillashaw’s six victories in UFC bantamweight competition are tied for the third most in divisional history behind Barao (eight) and Faber (eight).

Dillashaw’s five stoppage victories in UFC bantamweight competition are tied for the second most in divisional history behind Faber (six).

Dillashaw’s four knockout victories in UFC bantamweight competition are the most in divisional history.

Dillashaw’s five knockdowns landed in UFC bantamweight competition are tied for the most in divisional history.

Dillashaw scored the latest head-kick knockout finish in UFC history when he stopped Joe Soto at the 2:20 mark of Round 5 at UFC 177.

Dillashaw is one of two fighters in UFC history to earn two fifth-round stoppage victories. He accomplished the feat against Soto at UFC 177 and Barao at UFC 173. Flyweight champ Demetrious Johnson also accomplished the feat.

Dillashaw is the only fighter in UFC history to land more than 100 significant strikes in three consecutive fights. He accomplished the feat against Soto at UFC 177, Barao at UFC 173 and Mike Easton at UFC Fight Night 35.

Dillashaw’s output of 5.56 strikes landed per minute in UFC bantamweight competition is the highest rate in UFC/WEC bantamweight history.

Dillashaw’s +3.14 strike differential rate in UFC bantamweight competition is highest margin in divisional history.

Dillashaw’s 76 significant ground strikes landed against Walel Watson at UFC on FUEL TV 1 stand as the most in a single UFC bout.

Dillashaw has committed to 11 submission attempts in UFC bantamweight competition, the second most in divisional history behind Alex Caceres (12).

Barao’s eight victories in UFC bantamweight competition are tied with Faber for the most in divisional history. His 10 wins when including WEC competition are tied with Dominick Cruz and Scott Jorgensen for the most in the combined history of the weight class.

Barao’s five stoppage victories UFC bantamweight competition are tied for the second most in divisional history behind Faber (six).

Barao’s takedown defense rate of 100 percent in his UFC career is the highest in company history. He is the only fighter in UFC history to defend the first 20 takedowns attempted against him/her under the UFC banner.

Barao’s takedown accuracy of 52.2 percent in UFC bantamweight competition is the second highest rate in divisional history behind Erik Perez (61.9 percent).

Barao’s three submission victories in UFC bantamweight competition are tied for the second most in divisional history behind Faber (six). His five submission wins when including WEC competition are the second most in the combined divisional history behind Faber (seven).

Barao is one of six fighters in UFC history to register two arm-triangle-choke submission victories. Dan Severn, Eric Schafer, Rick Story, Thales Leites and Francisco Trinaldo have also accomplished the feat.

Barao is one of just three fighters in UFC history to earn a knockout stemming from a spinning back kick. He stopped Eddie Wineland with the technique at UFC 165. Barao is the only one of the three to finish a fight by landing the strike to the head.

Barao has been awarded five fight-night bonuses during his UFC bantamweight career, which is tied with Brad Pickett for the most fight-night bonuses in divisional history.

Co-main event

Miesha Tate (16-5 MMA, 3-2 UFC) competes in her sixth UFC women’s bantamweight bout and will tie Jessica Andrade for the most appearances in divisional history.

Tate’s three-fight UFC winning streak in women’s bantamweight competition is tied with Bethe Correia for the second longest active streak in the division behind champion Ronda Rousey (five).

Tate has earned all three of her UFC victories by decision.

Tate has earned at least one takedown in 12 of her 13 UFC/Strikeforce appearances.

Tate is the only fighter in combined Strikeforce/UFC/WEC/PRIDE history to come back from being knocked down three times in a fight to finish their opponent. She accomplished the feat against Julie Kedzie at “Strikeforce: Rousey vs. Kaufman.”

Tate has been stopped inside the distance in all five of her career losses.

Remaining main card

Edson Barboza’s (15-3 MMA, 9-3 UFC) five knockout victories in UFC lightweight competition are tied for the third most in divisional history behind Melvin Guillard (seven) and B.J. Penn (six).

Barboza’s eight knockdowns landed in UFC lightweight competition are tied for the second most in divisional history behind Guillard (13).

Barboza’s four knockout victories stemming from kicks are tied with Donald Cerrone for most in UFC history.

Barboza is the only fighter in UFC history to earn knockout finishes stemming from head, body and leg kicks.

Barboza is the only fighter in UFC history to earn two knockout victories stemming from leg kicks. He used the technique to stop Rafaello Oliveira at UFC 162 and Mike Lullo at UFC 123.

Barboza has landed 32 percent of his 443 significant strikes to his opponents’ legs, the largest proportion of leg strikes among active UFC lightweights.

Paul Felder (10-0 MMA, 2-0 UFC) is one of three fighters in UFC history to earn a knockout victory stemming from a spinning backfist. He accomplished the feat against Danny Castillo at UFC 182.

Joe Lauzon (24-10 MMA, 11-7 UFC) will compete in his 19th UFC lightweight contest, tied for the fourth most appearances in divisional history behind Gleison Tibau (25), Melvin Guillard (20) and Yves Edwards (20).

Lauzon earned 23 of his 24 career victories by stoppage, with 18 of those finishes by submission.

Lauzon’s 10 stoppage victories in UFC lightweight competition are the most in divisional history.

Lauzon’s seven submission victories in UFC lightweight competition are tied with Nate Diaz and Kenny Florian for the most in divisional history.

Lauzon has attempted 26 submission attempts in UFC competition, the third most in company history behind Jim Miller (34) and Chris Lytle (31).

Lauzon attempts 2.9 submissions per 15 minutes of fighting in UFC lightweight competition, the highest rate among active fighters in the weight class.

Lauzon has been awarded 13 fight-night bonuses during his UFC career, the most of any fighter in history. Cerrone holds the all-time record for Zuffa-owned promotions with 15 total bonuses.

Takanori Gomi (35-10 MMA, 4-5 UFC) has alternated wins and losses over his past four UFC appearances.

Gomi owns a 10:3 knockdown ratio during UFC and PRIDE competition.

Gomi recorded the fastest knockout in the history of the now-defunct PRIDE organization when he stopped Ralph Gracie in just six seconds at PRIDE Bushido 3.

Preliminary card

Gian Villante (13-5 MMA, 3-2 UFC) is the only light-heavyweight fighter in UFC history to absorb 100 or more significant strikes in three consecutive fights.

Villante lands 4.36 significant strikes per minute in UFC light-heavyweight competition, the second highest output among active fighter in the weight class behind Fabio Maldonado (5.93).

Villante and Sean O’Connell combined for 202 significant strikes landed at UFC Fight Night 43, a three-round light-heavyweight record.

Villante’s knockout of Corey Anderson at the 4:18 mark of Round 3 at UFC on FOX 15 marked the second latest knockout in a three-round UFC light-heavyweight contest. Mauricio Rua’s victory over Mark Coleman at UFC 93 holds the record.

Tom Lawlor (9-5 MMA, 5-4 UFC) returns to competition for the first time since April 6, 2013. His 840-day layoff is his longest dating back to his March 2007 debut.

Lawlor moves back up to the UFC light-heavyweight division for the first time since his promotional debut in December 2008. He went 4-4 at middleweight.

Lawlor has alternated wins and losses over his past six UFC appearances. His was victorious in his last bout at UFC on FUEL TV 9 in April 2013.

Lawlor is one of five fighters in modern UFC history to earn a knockout and a submission victory both in less than a minute each. Rousey, Lauzon, Andrei Arlovski and Derek Brunson also accomplished the feat.

Jim Miller (24-6 MMA, 13-5 UFC) competes in his 20th UFC lightweight bout, which tied for the second most appearances in divisional history behind Tibau (25).

Miller enters the event on the first two-fight skid of his career. He hasn’t earned a victory since April 2014.

Miller’s 13 UFC lightweight victories are tied with champion Rafael dos Anjos for the third most in divisional history behind Tibau (16) and Cerrone (15).

Miller’s eight stoppage victories in UFC lightweight competition are tied for the fourth most in divisional history behind Lauzon (10), Penn (nine) and Cerrone (nine).

Miller’s six submission finishes in UFC lightweight competition are the fourth most in divisional history behind Lauzon (seven), Diaz (seven) and Florian (seven).

Miller’s has attempted 34 submissions in his UFC career, the most of any fighter in UFC history.

Danny Castillo (17-8 MMA, 7-5 UFC) competes in his 21th UFC/WEC lightweight bout and will tie Yves Edwards for the third most appearances in combined divisional history behind Cerrone (28) and Tibau (24).

Castillo’s five knockout victories in UFC/WEC lightweight competition are tied for the third most in the combined history of the two organizations behind Guillard (seven) and Penn (six).

Kenny Robertson (15-3 MMA, 4-3 UFC) is the author of the only Suloev-stretch submission in UFC history. He used the rare technique to finish Brock Jardine at UFC 157.

Robertson lands 55.5 percent of his significant strikes in UFC welterweight competition, the highest rate in divisional history.

Ben Saunders (18-6-2 MMA, 6-3 UFC) has earned both of his victories since his UFC return by submission.

Saunders earned the first omoplata submission finish in UFC history when he defeated Chris Heatherly at UFC Fight Night 49.

Saunders’ omoplata finish was just the second in the combined history of UFC, WEC, Strikeforce and PRIDE. Shane Del Rosario was the other to accomplish the feat.

Eddie Wineland (21-10-1 MMA, 3-4 UFC) returns to competition for the first time since May 10, 2014. His 441-day layoff is the longest of a career dating back to his April 2003 debut.

Wineland’s five knockout victories in UFC/WEC bantamweight competition are the most in combined divisional history.

Wineland’s eight knockdowns landed in UFC/WEC bantamweight competition are the most in combined divisional history.

Wineland has defended 92 percent of all opponent takedown attempts in UFC bantamweight competition, the second highest rate in divisional history behind Barao (100 percent).

Bryan Caraway (19-7 MMA, 4-1 UFC) has earned 17 of his 19 career victories by submission. That includes all four of his UFC victories. Of those 17 submissions, 11 were rear-naked chokes.

Caraway’s three submission victories in UFC bantamweight competition are tied for the second most in divisional history behind Faber (six).

Caraway attempted at least one submission against five of his six UFC opponents.

Caraway has landed two or more takedowns against all six of his opponents. He’s completed at least one takedown against all eight UFC/WEC opponents.

Daron Cruickshank (16-6 MMA, 6-4 UFC) is one of five fighters in UFC history to earn three knockout victories stemming from a head kick.

James Krause (21-7 MMA, 2-3 UFC) enters the event with just one victory in his past four bouts.

Krause lands 5.32 significant strikes per minute in UFC lightweight competition, the second highest rate in divisional history behind T.J. Grant (6.83).

Krause’s submission victory over Sam Stout at the 4:47 mark of Round 3 at UFC 161 stands as the second latest submission in a three-round UFC fight. Joe Proctor’s finish of Justin Edwards at UFC Fight Night 68 holds the record.

Ramsey Nijem (9-5 MMA, 5-4 UFC) has suffered all five of his pro losses by knockout or submission. Three of those stoppages have come in the first round.

Nijem absorbs just 1.46 significant strikes per minute in UFC lightweight competition, the lowest rate in divisional history behind Matt Serra (1.24).

Nijem’s +1.84 strike differential rate in UFC lightweight competition is the second largest margin in divisional history behind Grant (+2.19)

Nijem has completed 57.1 percent of his takedown attempts in UFC lightweight competition, the highest rate among active fighters in the weight class.

Nijem has taken down his opponent at least once in all eight of his UFC lightweight appearances.

Andrew Holbrook (9-0 MMA, 0-0 UFC) has earned all nine of his career victories by submission. He’s earned all but one of those finishes in the first round.

Jessamyn Duke (3-2 MMA, 1-2 UFC) landed 123 significant strikes in her UFC debut against Peggy Morgan at The Ultimate Fighter 18 Finale, the most for a debuting UFC fighter.

Elizabeth Phillips (4-3 MMA, 0-2 UFC) has suffered both of her UFC losses by split decision.

Zak Cummings (17-4 MMA, 2-1 UFC) is one of 12 fighters in UFC history to finish a fight via D’arce-choke submission. He used the technique to submit Ben Alloway at UFC Fight Night 27.

For more on UFC on FOX 16, check out the UFC Events section of the site.

FightMetric research analyst and live statistics producer Michael Carroll contributed to this story. Follow him on Twitter @MJCflipdascript.