Joseph George Nelson (born October 25, 1974, in Alameda, California) is a relief pitcher in Major League Baseball who is currently in the Boston Red Sox organization, known mainly for his "Vulcan" change up.
Nelson attended Chico High School in Chico, California, before transferring to St. Joseph Notre Dame in Alameda, California. At St. Joseph, Nelson played basketball on the 1992 California State Division I Championship team with NBA star Jason Kidd.
After two seasons at Seminole State College from 1994–-1995, he transferred to the University of San Francisco. In a switch to pitching at USF, he went undefeated, recording five saves.