Over four seasons Allen graded 86.8% for blocking consistency, registered 386 knockdowns, allowed just four sacks and three pressures, while only committing seven penalties while seeing action during 1,309 pass plays during his tenure with the Griffons.

Allen was a First-team Freshman All-American selection in 2005 after starting all 12 games at both offensive guard spots.

In 2006, he was First-team All-Mid-America Intercollegiate Athletics Association as he started all 12 games at right offensive guard.

In 2006 Allen was a Little All-American choice by The NFL Draft Report and a First-team All-MAIA Association selection for the second straight season.

As a senior, in 2008, Allen was a First-team Little All-American and All-Mid-America Intercollegiate Athletics Association selection by the AFCA and AP.