Ty Hubert Detmer (born October 30, 1967 in San Marcos, Texas), is an American football quarterback who starred at Brigham Young University before beginning his pro career.

Detmer attended Southwest High School in San Antonio, Texas. He earned letters in golf, football, basketball, baseball, and track. As a senior, he won All-America honors in football and was the Texas Player of the Year. He also won All-State honors in baseball and All-District in basketball. His father, Sonny, was his football coach.

In college, Detmer was a starter as a freshman in 1988. As a four year starter in an offense based on passing, he set 58 NCAA records. Among those records were the marks for completions (958), attempts (1530), passing yards (15,031), and touchdowns (121). The highpoint of his career was passing for 406 yards and 3 touchdowns in BYU's 28-21 upset victory over top-ranked Miami (FL) during the 1990 season.

Additionally, Detmer was named an All-American in both 1990 and 1991. He also won the Heisman Trophy after the 1990 season. Many believed he would turn pro after the 1990 season, but Detmer returned to BYU where he finished third in voting for the Heisman in 1991.

Detmer was believed to be too small to play quarterback effectively in the NFL and was passed over until the ninth round when he was drafted by the Green Bay Packers. In four seasons in Green Bay, Detmer threw just 21 passes.

Detmer played for the Philadelphia Eagles, San Francisco 49ers, and Cleveland Browns before missing the 2000 season with an injury. He returned to the NFL in 2001 with the Detroit Lions. He currently plays for the Atlanta Falcons.

In 13 NFL seasons, Detmer has played 54 games. He has 6,351 yards, 546 completions on 946 attempts and 34 touchdowns. His brother, Koy Detmer, is a backup quarterback with the Eagles. Interestingly enough, Koy joined the Eagles the year after his brother left, so there has been a Detmer playing for Philadelphia every year since 1996.