John Kastan was considered by former head coach Buff Donelli to be one of the two best fullbacks he ever coached in his 47 years on the sidelines. Kastan came to B.U. via Glassport H.S. in Glassport, PA where he was a three-sport athlete, playing football, basketball and baseball. He ranks 13th on the Terriers all-time rushing list with 1,182 yards in three seasons. His 886 yards in 1951 is good for 12th-best in a season.

Upon graduation, he held school records for most rushing touchdowns in a game, most touchdowns in a game, most touchdowns in a season, most touchdowns in three years of varsity competition, most points in a game, and most career points. These records have been eclipsed over time, but they do not diminish what Kastan was able to accomplish on the football field for the Terriers.

Kastan was drafted by the New York Giants upon graduating from B.U., but before his NFL career began, he was part of another draft. This one sent him to Korea for two years.