Johnathan Paul Manziel ( man-ZEL; born December 6, 1992) is an American professional Canadian football quarterback for the Montreal Alouettes of the Canadian Football League (CFL). He previously played two seasons with the Cleveland Browns of the National Football League (NFL) and was also a member of the Hamilton Tiger-Cats in the CFL. Manziel was nationally recruited out of high school as a dual-threat quarterback, and he debuted for the Texas A&M Aggies as a redshirt freshman in Kevin Sumlin's Air Raid offense during A&M's first season in the Southeastern Conference (SEC) in 2012. He broke numerous NCAA Division I FBS and SEC records, which included becoming the first freshman and fifth player in NCAA history to pass for 3,000 yards and rush for 1,000 yards in a season. At the end of the regular season, he became the first freshman to win the Heisman Trophy, Manning Award, and the Davey O'Brien National Quarterback Award. Manziel capitalized on his redshirt freshman season by leading Texas A&M to a 41–13 victory over Oklahoma in the Cotton Bowl.Manziel was drafted by the Browns as the 22nd overall pick of the 2014 NFL Draft. Despite some success, he struggled with consistency and his tenure was overshadowed by off-field controversies. He was released by the Browns after the end of the 2015 season. Following further controversies during the 2016 offseason, Manziel was unable to be signed by another team before the start of the season and spent two years away from football before returning with the Tiger-Cats in 2018. He was later traded to the Alouettes during the season. TexAgs users tagged Manziel with the nickname "Johnny Football" during Manziel's sophomore high school football season in Texas. The nickname followed him to Texas A&M University. Manziel applied for and was granted a registered trademark for the nickname in 2013.

He is also known as Johnny Football.