Abey entered the 2015 season as the fourth string quarterback, sitting behind Keenan Reynolds, Tago Smith, and Will Worth. He did not make a single in game appearance in 2015.
Abey, now a junior, earned the spot of starting quarterback. In his third career start against Florida Atlantic, Abey rushed for 200 yards and passed for 100 yards. This achievement made it the first time in Naval Academy history that a Midshipmen quarterback has done so in a single game. He was named the AAC Co-Offensive Player of the Week. Through the first five weeks of the 2017 season, Abey ranked fifth among all Division I FBS players with 656 rushing yards. Despite the Midshipmen starting the season 5–0, Abey began showing signs of struggling with reading defenses and pitching the ball on perimeter option players. In October, he suffered a concussion against UCF and a shoulder injury against Temple. Slotback Malcolm Perry replaced him at quarterback with the exceptions of the Notre Dame and Houston games. Perry was eventually named the starter for the Military Bowl against Virginia. With his benching, Abey was considered for a fullback role, though head coachKen Niumatalolo opted to keep him at quarterback as the backup. In the Military Bowl, Abey recorded 88 rushing yards as part of a Navy bowl-record 452 total yards on the ground, along with a bowl-high five rushing touchdowns, becoming the first player to score five rushing touchdowns in an FBS bowl game since Kareem Hunt in 2015. He was named the game's Most Valuable Player. Abey concluded the 2017 season with 1,413 rushing yards, the second highest in school history behind Napoleon McCallum's 1,587 in 1983.
2018 season
Perry became the permanent starting quarterback for the 2018 season, while Abey was moved to wide receiver. After starting six games at receiver and missing the game against Air Force with a knee injury, Abey became the backup quarterback against Houston behind Garret Lewis when Perry moved to slotback. Abey returned to the starting quarterback role against Cincinnati. Navy ended the season 3–10.
Statistics
Post-college career
After graduating from the Naval Academy in May 2019, Abey was an assistant coach for the Midshipmen through the 2019 season before serving as a second lieutenant in the United States Marine Corps.