貝克·梅菲爾德

德克薩斯理工大學

在2013賽季開季前不久，梅菲爾德接替受傷的邁克爾·布魯爾成為先發四分衛。梅菲爾德被認為是第一個在開幕戰實際擔任四分衛位置的一年級生。
在首次對陣南方衛理會大學時，梅菲爾德傳出了413碼與四次達陣，並以60傳43中的成績打破由比利·喬·托利亞保持的學校紀錄，且是NCAA第一級別FBS僅有完成此紀錄的四名大一新生之一。 For his performance, Mayfield was named Big 12 Conference Offensive Player of the Week – the first freshman Texas Tech quarterback to be named so since current Red Raider head coach Kliff Kingsbury in 1999. The game featured the last four former Lake Travis quarterbacks combined on both teams: Garrett Gilbert, Michael Brewer, Collin Lagasse, and Mayfield.
Following the Red Raiders' second victory over Stephen F. Austin, Mayfield's 780 season yards and seven touchdowns already exceeded the 755 yards and six touchdowns accrued by Texas Tech's last true freshman quarterback, Aaron Keesee, in 10 games. After being affected by injury and losing the starting job to fellow true freshman Davis Webb, Mayfield finished the season with 2,315 yards on 218-of-340 completions with 12 touchdowns and 9 interceptions.
Mayfield was named one of 10 semifinalists for the Burlsworth Trophy in November; the award is given to the best player in Division I football who began his college career as a walk-on.
Mayfield earned Big 12 Conference Freshman Offensive Player of the Year for the 2013 season. Mayfield announced that he would be leaving the program due to a 'miscommunication' with the coaching staff.

奧克拉荷馬大學

梅菲爾德在2014年1月轉學至奧克拉荷馬大學，but had not contacted the Sooner coaching staff. Mayfield further elaborated in an interview with ESPN that he sought to transfer due to scholarship issues and a perception that he had earned the starting position and that further competition was not "really fair". The alleged scholarship issues were denied by Texas Tech coach Kliff Kingsbury.
In February 2014, Oklahoma head coach Bob Stoops confirmed that Mayfield would be walking on for the Oklahoma Sooners. Mayfield was not eligible to play until the 2015 season, and lost a season of eligibility due to Big 12 Conference transfer rules following an unsuccessful appeal of his transfer restrictions.

2015年賽季

On August 24, 2015, Mayfield was named the starting quarterback for the Sooners after winning an open quarterback competition against Trevor Knight. On September 6, 2015, Mayfield started against Akron. Mayfield totaled 388 yards through the air with 3 touchdowns on 23 completions in the 41–3 win. In the second game of the 2015 season, Mayfield started at Tennessee at Neyland Stadium. The Sooners were ranked 19th at the time and the Volunteers were ranked 23rd. Mayfield started off very slow in the game, not even reaching midfield until the 13-minute mark of the 4th quarter. Oklahoma came back from a 17-point deficit to win the game in double overtime. Mayfield threw for 187 yards and three touchdowns on 19 completions while throwing two interceptions early in the game in the 31–24 2OT win. In the third game of the season, Mayfield got the start against Tulsa. He had a career day throwing for 487 yards and four touchdowns, including 316 yards at half. Mayfield also ran for 85 yards and two touchdowns in the 52–38 win.
Mayfield finished the year with 3,700 passing yards, 36 touchdowns, and seven interceptions. He finished fourth in the Heisman Trophy voting and helped lead Oklahoma to the College Football Playoff semifinal (2015 Orange Bowl). However, they lost to Clemson by a score of 37–17.

2016年賽季

Mayfield started the 2016 season off with 323 passing yards and two touchdowns in a 33–23 loss to #15 Houston. In the rivalry game against Texas on October 8, he had 390 passing yards, three touchdowns, and two interceptions in the 45–40 victory. On October 22, in a 66–59 victory over Texas Tech, Mayfield had 545 passing yards and seven touchdowns in the historical matchup against Patrick Mahomes. Mahomes tallied 734 passing yards and five touchdowns to go along with Mayfield's numbers in a game that broke various single-game passing records. Over the final five games of the regular season, Mayfield totaled 1,321 passing yards, 15 passing touchdowns, and three interceptions to go along with three rushing touchdowns. All five games were victories for the Sooners.
It was announced in December 2016 that Mayfield and his top receiving target, Dede Westbrook, would be finalists for the 2016 Heisman Trophy. It was also announced that they would play in the 2017 Sugar Bowl. Mayfield ended up finishing third in the Heisman voting.
In the 2017 Sugar Bowl, Mayfield helped lead the Sooners to a 35–19 victory over Auburn. He finished the bowl game 19-for-28 with 296 passing yards and two touchdowns earning him the MVP award.

2017年賽季

2017年9月9日，梅菲爾德在球隊獲勝後，將奧克拉荷馬大學的旗幟插在俄亥俄體育場草地的O上面，這樣的舉動讓球迷們十分不滿，而本人也在不久後道歉。
2017年11月4日，梅爾爾德在對上同州世仇奧克拉荷馬州立大學時，繳出了生涯新高的598碼傳球，並以36傳24中5次傳球達陣的成績，帶領球隊以62-52擊潰對手。梅菲爾德同時作為奧克拉荷馬大學的首發四分衛，在瘋人大戰(奧克拉荷馬大學與奧克拉荷馬州立大學的世仇對決)中，達成生涯3-0的橫掃成績。
In November 2017, Mayfield was under fire again after an interaction during the game against Kansas. Mayfield was seen grabbing his crotch and mouthing "Fuck you!" at the coach of the opposing team. He also told their fans to "Go cheer on basketball." In response, Mayfield issued another public apology. Days after the 41–3 victory over Kansas, Sooners head coach Lincoln Riley announced that Mayfield would not start or be the captain during the upcoming game against West Virginia due to his actions against Kansas. 
2017年12月2日，12大聯盟睽違六年重新舉辦聯盟冠軍賽。梅菲爾德帶領球隊在冠軍賽中，以41-17擊敗了德克薩斯基督教大學。賽後梅菲爾德被選為冠軍賽MVP。奧克拉荷馬大學也取得了三年內第二個季後賽的資格。但最後在2018年玫瑰盃(季後賽半決賽)時以54-48輸給了喬治亞大學。
梅菲爾德以囊括大多數選票的優勢拿下海斯曼獎，他總共拿到了732張第一名選票，最終獲得2398分。換算下來，他總共拿下了86%的得票率，這在海斯曼獎歷史上可以排到第三高。此外，梅菲爾德是唯一以試訓球員身分拿下海斯曼獎的人。

「梅菲爾德條款」

當梅菲爾德打完他的大一球季之後，便從德克薩斯理工大學轉至奧克拉荷馬大學。梅菲爾德向NCAA上訴，希望能立即取得為奧克拉荷馬大學上場比賽的資格，因為他是藉由試訓管道進入德克薩斯理工大學，且沒有接受任何獎學金。梅菲爾德主張他並不適用跟領取獎學金的球員一樣的轉學制度。但上訴被駁回了，NCAA認為他並不符合立即上場的資格。12大聯盟的轉校規則，他只能到2015-16賽季才能出戰，而且將會損失一個賽季的大學球員資格。
奧克拉荷馬大學官方要求德州理工大學同意梅菲爾德上場，但德州理工大學拒絕並反對了這項要求。梅菲爾德被迫在2014年停賽，也損失了12大聯盟規則中要求的一年大學球員資格。
2016年6月1日，12大聯盟的代表們提出，讓像是梅菲爾德這樣藉由試訓且沒有領取獎學金的球員能夠擺脫轉學的限制，這項提案在第二天的投票中以7-3的比數通過，梅菲爾德也得以繼續參加2017年的比賽。而梅菲爾德的前學校德州理工大學也投下同意票。