Question: In 2015, Baker Mayfield won the Oklahoma starting quarterback position over which future Atlanta Falcons quarterback?

Context paragraphs:
Michael Vick: Michael Dwayne Vick (born June 26, 1980) is a former American football quarterback who played 13 seasons in the National Football League, primarily with the Atlanta Falcons and the Philadelphia Eagles.  He played college football at Virginia Tech and was selected by the Falcons as the first overall pick in the 2001 NFL Draft.  During his six years with the Falcons, Vick was regarded as having transformed the quarterback position with his rushing abilities and was named to three Pro Bowls.  He holds the record for the most career rushing yards by a quarterback (6,109) and the most rushing yards by a quarterback in a season (1,039).

Kiehl Frazier: Kiehl Frazier (born October 2, 1992) is an American football quarterback and safety.  He attended Ouachita Baptist University in 2014, having attended Auburn University the previous three years.  Frazier beat out returning quarterback Clint Moseley for the starting quarterback position for the 2012 Auburn Tigers football team.

Estel Tessmer: Estel S. "Zit" Tessmer (February 25, 1910 – June 1972) was an American football and basketball player.  A native of Ann Arbor, Michigan, Tessmer attended the University of Michigan where he played for the football and basketball teams.  He played as a quarterback for the Michigan Wolverines football teams from 1929 to 1931 and 1933.  He won the Chicago Alumni Trophy as a freshman in football.  He started three games at the quarterback position in 1930 and three more in 1931, but his playing time at quarterback was limited because the 1930 and 1931 Wolverines included College Football Hall of Fame quarterback Harry Newman.  After losing the starting quarterback job to Newman, Tessmer also played some games at the right halfback position.  Tessmer also played three years as a guard for the Michigan Wolverines men's basketball team from 1931 to 1934.  He later became a teacher and basketball coach at Bay City Central High School.  He also threw two no-hit games as a baseball pitcher in intramural sports while attending Michigan.  He was basketball coach at Bay City through 1953 and remained athletic director at the school thereafter.  Tessmer died in 1972 at age 61.  He was a resident of Bay City, Michigan at the time of his death.

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.

Shawn McCarthy: Shawn Michael McCarthy (born February 22, 1968) is a former American football punter in the National Football League.  He was drafted by the Atlanta Falcons in the 12th round of the 1990 NFL Draft and later played for the New England Patriots.  McCarthy played college football at Purdue, where he was also a quarterback.  He attended Fremont Ross High School and was the football teams' starting quarterback, punter and placekicker.

Seth Doege: Seth Colton Doege (born December 18, 1988) is an American football coach and formerly professional Canadian football quarterback.  After playing college football for Texas Tech University, he was signed by the Atlanta Falcons as an undrafted free agent in 2013.  On February 27, 2014, he was signed to the Saskatchewan Roughriders of the Canadian Football League.  Doege was Texas Tech's starting quarterback for the 2011 and 2012 seasons.  He is currently the wide receivers coach for Bowling Green.

Tyrod Taylor: Tyrod Di'allo Taylor (born August 3, 1989) is an American football quarterback for the Buffalo Bills of the National Football League (NFL).  He was the starting quarterback for the Virginia Tech Hokies football team from the start of the 2008 college football season through the 2011 Orange Bowl, the final game of the 2010 college football season for Virginia Tech.  He was drafted by the Baltimore Ravens in the sixth round of the 2011 NFL Draft and served as the backup to starting quarterback Joe Flacco, including during the Ravens' Super Bowl XLVII victory over the San Francisco 49ers.  Signed by Buffalo as a free agent in 2015, Taylor was named the starting quarterback for the Bills at the beginning of the 2015 NFL season.

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.

1993 Cleveland Browns season: The 1993 Cleveland Browns season was the team's 44th season with the National Football League.  This season was notable for coach Bill Belichick deciding to bench, and then ultimately release, longtime starting quarterback Bernie Kosar in favor of Vinny Testaverde.  Kosar resurfaced during the season with the Dallas Cowboys, when he was part of the eventual Super Bowl champions as a fill-in for injured quarterback Troy Aikman.  The Browns get off to a 5-2 start despite the Quarterback Controversy.  Prior to the start of the season the Browns signed Free Agent Quarterback Vinny Testaverde.  Originally Testaverde was supposed to back-up his former University of Miami teammate Bernie Kosar.  However, when Testaverde performed better when given the opportunity to play some felt there should be a change at the Quarterback position.  However, the Browns went beyond that by unceremoniously releasing Kosar in the middle of the season.  The Browns lost their next four games and seven of their last nine games to finish with a 7-9 record.

2015 Buffalo Bills season: The 2015 Buffalo Bills season was the franchise’s 56th overall season as a football team, 46th in the National Football League, third under leadership of general manager Doug Whaley and first under new head coach Rex Ryan, who signed a five-year, $27.5 million contract on January 12, 2015 after having previously spent the past six seasons coaching the division-rival New York Jets, leading them to two straight AFC Championship games in 2009 and 2010, becoming the franchise’s 18th head coach and the fifth in the past seven years in the process.  Ryan replaced Doug Marrone, who opted out of his contract on December 31, 2014 to take advantage of a contract loophole, fearing the Pegulas were going to fire him, hence the reason the Bills entered the 2015 season looking for a new head coach.  Despite the bold prediction made by Ryan at his introductory press conference, where he stated, “I’m not going to let our fans down.  I am not going to do that.  I know it’s been 15 years since the Bills made the playoffs.  Well, get ready, man, we’re going.  We are going,” the Bills were unable to make the playoffs in their first season with Ryan as head coach, finishing with a record of 8-8 (the team’s first since 2002), making it the 16th straight season without a playoff appearance, which became the longest active in major professional sports after Major League Baseball’s Toronto Blue Jays broke their 22-year playoff drought on September 25, 2015.  It was also the first full season under the ownership of Terry and Kim Pegula (whom also own the Buffalo Sabres), having purchased the Bills partway through 2014 after the death of longtime owner Ralph Wilson in March at the age of 95.  The Bills began their season with an open competition for the starting quarterback position after Kyle Orton, the starter for most of the 2014 campaign, retired during the offseason, so the team acquired free agent Tyrod Taylor, a former backup quarterback of the Baltimore Ravens, who won the competition over incumbent second-string quarterback EJ Manuel and trade acquisition Matt Cassel, the latter of whom the team later traded along with a seventh-round pick in 2017 to the Dallas Cowboys, in exchange for a fifth-round draft pick in 2017.

Supporting paragraphs: Baker Mayfield Trevor Knight
Answer: Trevor Knight