[1] Allen attended and played football at Fond du Lac High School, where he reclassified and graduated a year early.

[9] He was initially recruited as a defensive player, possibly linebacker or safety, before ultimately ending up at running back.

[10] Tailback redshirt freshman Jalen Berger left the team[10] and three running backs transferred away from the college.

[10] In early November, Mellusi had a season-ending injury as Allen was established as the team's starting running back.

[13] On April 27, 2024, Allen was selected in the fourth round with the 134th overall pick in the 2024 NFL draft by the New York Jets.