William Albert Sampen (born January 18, 1963) is a former professional baseball player who pitched in the Major Leagues from 1990-1994. He resides in Brownsburg, Indiana. Sampen owns an instructional baseball program in Brownsburg known as "Samp's Hack Shack.” In 2016 Sampen founded the Indiana Expos youth travel baseball program. The Expos have become one of the most well respected, fastest growing youth travel baseball programs in the state of Indiana for boys ages 13-17.