Kruper was at the forefront of Mary Washington developing into a national power in the early 1990s, and still ranks as the program’s all-time leader in career triples. He is one of only 10 Mary Washington players to be named as a first team all-conference selection three times, and was a two-time all-region selection. He batted .430 as a freshman en route to conference player of the year honors, and struck out just one time the entire season. He posted a career batting average of .384, with an on-base percentage of .490 and a slugging average of .563. His defensive prowess included a .975 career fielding average, as he committed just 13 errors in four years in 520 chances.