[1] Casper played collegiate football at the University of Notre Dame, where he earned Honorable Mention All-America for the Fighting Irish as a tackle in 1972.
Casper made an over-the-head catch of a soft pass lofted by Ken Stabler on "The Ghost to the Post."
Casper was also involved in another famous NFL contest in 1978 on September 10 between the Raiders and San Diego Chargers.
The Raiders trailed the Chargers 20–14 with just ten seconds left in the game when Oakland quarterback Ken Stabler, about to be sacked, dropped the football.
Casper kicked the ball at the San Diego 5-yard line and finally recovered it in the end zone to tie the game.
Stabler, Banaszak and Casper all admitted afterwards that they had deliberately fumbled or batted the ball towards the end zone.
[5] Casper caught the first touchdown of Super Bowl XI, a 32–14 Raiders victory over the Minnesota Vikings.
In 1984, he returned to the Raiders (who won another Super Bowl the year before) for his final NFL season.