Seymour Cassel was 62 in Rushmore when he played the character 'Bert Fischer'.
That was over 25 years ago in 1998.
In 2019 he died aged 84, starring in 159 films in his career, 64 of those after Rushmore was first released. If he were alive today he would be 89.
In Rushmore, I think Seymour Cassel looks: