Matthew Christopher Whiteside (born August 8, 1967 in Charleston, Missouri) is a former Major League Baseball pitcher. He graduated from Charleston High School in Charleston, lettering in baseball, football, and basketball, in 1986, and then attended Arkansas State, graduating with a degree in physical education. While at Arkansas, Whiteside joined Pi Kappa Alpha fraternity. On July 15, 2005, Whiteside was suspended for 15 games for violating minor league baseball's steroid policy. He spent 2006 with the Indianapolis Indians, posting a 1.69 ERA in 20 games, collecting 10 saves.