Allen, who spent all three years of his college career at Wymoning, was joined by his mother and father to celebrate the honourable occasion.
In his three years with Wyoming, Allen finished at No. 8 on the university's all-time passing list with 5,066 - his 44 passing touchdowns rank fifth.
He finished his collegiate career with 5,822 total yards, 56 total touchdowns, six interceptions, and a 127.8 passer rating.
Allen would go on to be selected seventh overall in the 2018 NFL Draft and has since led a successful career as the Bills' quarterback, recently winning the 2024 NFL MVP Award.