Question: Trevor Knight was replaced on the Atlanta Falcons by whom?

full_context: Document 1: Sam Bradford: Samuel Jacob Bradford (born November 8, 1987) is an American football quarterback for the Minnesota Vikings of the National Football League (NFL). Bradford attended Putnam City North High School in Oklahoma City, where he starred in football, basketball and golf. As a senior quarterback in 2005, he threw for 2,029 yards and 17 touchdowns in 12 games. Bradford was not highly recruited coming out of high school, but he did receive a scholarship offer from the University of Oklahoma, which he accepted. After a redshirt season in 2006, Bradford threw for 3,121 yards and 36 touchdowns as a redshirt freshman. That set the stage for a phenomenal 2008 year, when Bradford became only the second sophomore to win the Heisman Trophy as he was the trigger man for the highest-scoring offense in NCAA history, throwing for 4,464 yards with 48 touchdowns and just six interceptions. He again led the nation in passing and also added five rushing touchdowns as the Sooners went 12-1 and advanced to the BCS national title game. Bradford declared for the NFL draft following the 2009 season and was drafted by the St. Louis Rams with the first overall pick in the 2010 NFL Draft.
Document 2: Jameis Winston: Jameis Lanaed Winston ( , , born January 6, 1994) is an American football quarterback for the Tampa Bay Buccaneers of the National Football League (NFL). Born and raised in Alabama, he was a highly regarded quarterback in high school, and led his team to the state championship as a junior. Winston played college football for the Florida State Seminoles and as a Redshirt freshman became the youngest player to win the Heisman Trophy and helped lead the Seminoles to a victory in the 2014 BCS National Championship Game. In his sophomore and final year, the Seminoles advanced to the Rose Bowl, part of the College Football Playoff. Winston also played on Florida State's baseball team. Winston was drafted as the first overall pick by the Buccaneers in the 2015 NFL Draft.
Document 3: Josh Heupel: Joshua Kenneth Heupel (born March 22, 1978) is the offensive coordinator and quarterbacks coach for the Missouri Tigers. He is also a former college football player who played quarterback for the Oklahoma Sooners football team at the University of Oklahoma. During his college playing career, he was recognized as a consensus All-American, won numerous awards, and led Oklahoma to the 2000 BCS National Championship. Heupel became a coach after his playing career ended. He served as co-offensive coordinator for the Oklahoma Sooners until January 6, 2015, when he was fired from his position. He was named the assistant head coach, offensive coordinator, and quarterbacks coach at Utah State on January 23, 2015. After one season at Utah State, he was hired at the University of Missouri under Barry Odom's new staff.
Document 4: Baker Mayfield: Baker Reagan Mayfield (born April 14, 1995) is a college American football quarterback for the Oklahoma Sooners. Mayfield began his college football career as a walk-on player for the Texas Tech Red Raiders. He is notable for being the first walk-on true freshman quarterback to start a season opener at a BCS school. Mayfield transferred from Texas Tech to Oklahoma following alleged scholarship issues and a lack of communication with coaches. After sitting out the 2014 season due to NCAA transfer rules, Mayfield won the starting quarterback job in 2015 over Cody Thomas and incumbent starter Trevor Knight.
Document 5: 2012 Texas A&amp;M vs. Alabama football game: The 2012 Texas A&M vs. Alabama football game was a college football game between the Texas A&M Aggies and Alabama Crimson Tide at Bryant–Denny Stadium in Tuscaloosa, Alabama. This was the game where Texas A&M freshman quarterback and eventual Heisman Trophy winner Johnny Manziel completed 24 of 31 passes, had 253 passing yards, and two passing touchdowns with 92 rushing yards to help No. 15 Texas A&M upset No. 1 Alabama 29–24, which led him to being the first freshman to win the Heisman Trophy.
Document 6: Todd Reesing: Todd Reesing (born September 20, 1987) is a former American football quarterback. He played in college at the University of Kansas. After graduating from Kansas, he briefly spent time with the Saskatchewan Roughriders of the Canadian Football League during their 2010 off-season. After his career was over, he began doing color commentary for the Jayhawk Television Network. Reesing led the Jayhawks to their best start in school history, winning their first 11 games of the 2007 season. The Jayhawks finished the season 12–1 and won the 2008 Orange Bowl, the schools first and only BCS Bowl victory. Reesing owns Kansas career passing records in several categories, passing yards, passing touchdowns, quarterback rating (minimum 200 attempts), completions, attempts, and completion percentage (minimum 200 attempts), as well as single game records for passing yards and passing touchdowns.
Document 7: Matt Schaub: Matthew Rutledge Schaub (born June 25, 1981) is an American football quarterback for the Atlanta Falcons of the National Football League (NFL). He played college football for the University of Virginia, and was drafted by the Falcons in the third round of the 2004 NFL Draft. He has also played for the Houston Texans, Oakland Raiders and Baltimore Ravens.
Document 8: My-King Johnson: My-King Johnson (born June 7, 2004) is an American college football defensive end for the Arizona Wildcats of the University of Arizona. He is openly gay, and he and Scott Frantz are two of the first openly gay players in the NCAA Division I Football Bowl Subdivision. However, in 2017 Johnson redshirted while Frantz became the first openly gay college football player to play in a game for a NCAA Division I Football Bowl Subdivision school.
Document 9: Trevor Knight: Trevor Knight (born October 3, 1993) is an American football quarterback for the Atlanta Falcons of the National Football League (NFL). He played college football for the Oklahoma Sooners and Texas A&M Aggies. After leading Oklahoma to an 8–5 record in the 2014 season, he lost the starting job in an open quarterback competition to Texas Tech transfer Baker Mayfield prior to the 2015 season. On January 4, 2016, it was announced that Knight would transfer to Texas A&M University.
Document 10: Matt McGloin: Matthew James McGloin (born December 2, 1989) is an American football quarterback who is currently a free agent. He was the starting quarterback for the Penn State Nittany Lions football team from 2010 to 2012. He is the first walk-on quarterback to start at Penn State since scholarships were reinstated in 1949. Prior to his college career, McGloin was a Pennsylvania all-state quarterback while attending West Scranton High School.
Document 11: Clayton Thorson: Clayton James Thorson is an American football quarterback. He is currently a redshirt junior and the starting quarterback for the 2017 Northwestern Wildcats football team. After redshirting in 2014, he was named the starting quarterback in 2015 and led the Wildcats to the third 10-win season in program history. As a starter for the 2016 team, he earned Academic All-Big Ten honors. Thorson was selected by ESPN.com as the seventh best high school quarterback and played in the 2014 Semper Fidelis All-American Bowl.
Document 12: Matt Barkley: Matthew Montgomery Barkley (born September 8, 1990) is an American football quarterback who is currently a free agent. He played college football at USC, and was drafted by the Philadelphia Eagles in the fourth round of the 2013 NFL Draft. Barkley has also played for the Arizona Cardinals, Chicago Bears and San Francisco 49ers.
Document 13: Colin Kaepernick: Colin Rand Kaepernick ( ; born November 3, 1987) is an American football quarterback who is currently a free agent. Kaepernick played college football at the University of Nevada, where he was named the Western Athletic Conference (WAC) Offensive Player of the Year twice and became the only player in NCAA Division I FBS history to amass 10,000 passing yards and 4,000 rushing yards in a career. After graduating, he was selected by the San Francisco 49ers in the second round of the 2011 NFL Draft.
Document 14: Dak Prescott: Rayne Dakota "Dak" Prescott (born July 29, 1993) is an American football quarterback for the Dallas Cowboys of the National Football League (NFL). He played college football for the Mississippi State Bulldogs and was selected by the Cowboys in the fourth round of the 2016 NFL Draft.
Document 15: Case McCoy: Casey Burl "Case" McCoy (born February 12, 1990) is a former American football quarterback for the University of Texas Longhorns football team. He started 16 games for Texas over a three-year period, amassing a 9–7 record. He is also known as the younger brother of NFL quarterback Colt McCoy.
ground_truth: Baker Mayfield