When Trevor Knight starts Oklahoma's season opener against Louisiana-Monroe on Saturday, he'll become the ninth freshman to start at quarterback for the Sooners. Here's a look at how the others fared:
As a freshman (2009): Jones was pressed into duty when Sam Bradford went down to an injury in the season-opener against BYU and started the next three games before Bradford returned. Bradford was reinjured a game later and Jones started the rest of the season, throwing for a total of 3,198 yards 26 touchdowns.
Career: Jones shattered Bradford's school career passing records, throwing for 16,646 yards and 123 touchdowns.
Starting debut: After coming on in the loss to BYU, Jones started a week later against Idaho State, throwing for 286 yards and three touchdowns in a 64-0 blowout.
As a freshman (2007): In his debut, Bradford broke Josh Heupel's record for passing yards in a half with 350 yards and tied Jason White's record with 18 consecutive completions. He finished the season throwing for 3,121 yards and 36 touchdowns.
Career: Bradford won the Heisman Trophy as a sophomore, throwing for 4,720 yards and 50 touchdowns. He set school career records in yards (8,403) and touchdowns (88) before being injured twice as a junior and declaring for the draft. He was the No. 1 overall pick in 2010.
Starting debut: In a 79-10 rout of North Texas, the Putnam City North product threw for 363 yards and three touchdowns no interceptions.
As a freshman (2005): Paul Thompson was the starter in the season opener, but Bomar played in an opening loss to TCU, then took over as the starter. Bomar threw for 2,018 yards and 10 touchdowns, helping the Sooners to a Holiday Bowl win over Oregon.
Career: Bomar was kicked off the team just before his sophomore season and wound up at Sam Houston State.
Starting debut: The Sooners needed a strong performance from Adrian Peterson (220 yards on 32 carries) to get past Tulsa, 31-15, in the season's second game. Bomar completed just five of 13 passes for 42 yards and two interceptions and didn't attempt a pass in the second half.
As a freshman (1998): After playing briefly in relief in a season-opening win over North Texas, Sills didn't play again at quarterback until the seventh game. The walk-on from Garden City, Kan., started the final four games, helping the Sooners finish the John Blake era by winning three of their last four.
Career: Sills transferred to Garden City Community College after Blake was fired and Bob Stoops was hired.
Starting debut: Sills didn't start until Oct. 31 against Iowa State and helped the Sooners break a five-game losing streak with a 44-yard touchdown pass to Gerald Williams with just more than a minute remaining to give OU a 17-14 win. Sills threw for 134 yards and two touchdowns.
As a freshman (1996): Eric Moore started the opener against TCU, but the redshirt from Tulsa Union quickly took the job and stayed in place for much of the rest of the season. Fuente threw for 1,271 yards and eight touchdowns with 10 interceptions as the Sooners finished 3-8.
Career: Fuente started his sophomore year as the starting quarterback but struggled and eventually the Sooners went back to an option offense under Brandon Daniels and Eric Moore. After the season, Fuente transferred to Murray State.
Starting debut: Fuente started at San Diego State in the second game, completing 10 of 16 passes for 197 yards. He threw an interception and didn't have a touchdown in the 51-31 loss.
As a freshman (1996): In Howard Schnellenberger's lone season in Norman, Moore beat out incumbent Garrick McGee for the spot. He started all 11 games, going 5-5-1 and throwing for 1,375 yards and seven touchdowns with nine interceptions.
Career: Moore started the next season before losing his spot to Justin Fuente. Moore returned to start late in the season. He started games at quarterback in each of his four years, though never again was the full-time starter.
Starting debut: Moore split time with Garrick McGee in a 38-22 win over San Diego State at home, throwing for 143 yards and rushing for 35. Moore didn't have a touchdown and threw an interception.
As a freshman (1985): When Troy Aikman broke his leg in the season's fourth game, the true freshman Holieway stepped in and led the Sooners to eight consecutive wins. Holieway is the only true freshman to quarterback a team to a national championship.
Career: Holieway helped the Sooners to an 11-1 season as a sophomore, then started 8-0 before tearing his ACL in a Bedlam win late in the season. Holieway returned as a senior and started, though Charles Thompson played often and Holieway never regained the elusiveness that helped make him one of the most successful wishbone quarterbacks ever.
Starting debut: A week after Aikman's season was ended, the Holieway era began in front of the first home non-sellout for the Sooners since 1971. Holieway ran 11 times for 76 yards and a touchdown and threw a 77-yard touchdown pass to Derrick Shepard in a 59-14 rout of Iowa State. The Sooners rushed for 542 yards and totaled eight touchdowns and 643 total yards.