[1] He attended Lawrence Central High School in Indiana, where he played football and recorded 42 tackles as a senior.
[2] A three-star recruit, he committed to play college football for the Purdue Boilermakers.
[2] He remained a starter in 2021, being named honorable mention All-Big Ten Conference after recording 26 tackles, 10 tackles-for-loss (TFLs), 4.5 sacks and a forced fumble.
[4][6] In 2022, he appeared in 12 games, posting 28 tackles, four TFLs and 2.5 sacks while repeating as an honorable mention All-Big Ten selection.
[6][7] Deen entered the NCAA transfer portal after the season, concluding his stint at Purdue having appeared in 32 games, making 73 tackles, 15.5 TFLs and 6.5 sacks.