Sayin attended Carlsbad High School in Carlsbad, California, and became the starting quarterback for the Lancers as a junior in 2019.[1] That season, he threw for 2,349 yards, 24 touchdowns, and eight interceptions and led the Lancers to a 10–2 (6–0) record and an Avocado League championship.[2][3] Due to the COVID-19 pandemic, the 2020 season was cut short to only five games, in which he threw for 962 yards and 13 touchdowns.[4] Sayin led the Lancers to another Avocado League championship with a 5–0 (4–0) record.[5] He committed to the University of Pennsylvania over Cornell.[6]
Sayin started the 2021 season as the backup to senior, John Quinnelly. Sayin saw his first action against the Yale Bulldogs after an injury to Quinnelly. He finished 12-for-28, 114 yards, and two touchdowns.[7] Sayin's final game of the season was against Princeton, passing for 255 yards, a touchdown, and two interceptions.[8] Starting the last five games of the season, Sayin passed for 920 yards on 163 attempts to 88 completions, and five touchdowns to seven interceptions.[9]
2022 season
Sayin was named the starter going into the 2022 season. In the season opener, he passed for 289 yards and two touchdowns in a 25–14 victory.[10] Against Dartmouth, Sayin threw for 204 yards and a touchdown in 23–17 double-overtime win.[11] Against Georgetown, he accounted for five total touchdowns, which was the most by a Quaker since 2010, in a 59–28 win.[12] Against No. 22 Princeton, Sayin led a fourth-quarter comeback to win, 20–19.[13] During the game, he completed 38 passes, second-most in program history, for 261 yards and two touchdowns, earning Ivy League Offensive Player of the Week honors for his efforts.[14] Sayin finished the season with 253 completions (1st Ivy), 2,344 yards (2nd), and 18 touchdowns (T–1st). His passing yardage was fifth most in program history and the most since Alek Torgersen had 2,689 yards in 2014. Sayin was named All-Ivy honorable mention.[15] He was also named to the College Sports Communicators Academic All-District Team.[16]
Sayin's younger brother, Julian, is also a college football quarterback and a 2024 college football prospect who plays for the Ohio State Buckeyes.[6] His older sister, Bailey, played soccer at the University of Chicago.[17]