John Nicklaus Hoover (December 22, 1962 – July 8, 2014) was the Major League Baseball No. 25 draft choice in the first round in 1984 (by Baltimore), after having led the nation in strikeouts in college baseball, pitching 205 strikeouts for Fresno State in his senior year. Also in 1984 Hoover was an opening pitcher for the United States Olympic baseball team, winning the opening game and helping the US to win the silver medal for baseball. His teammates on the Olympic team included Mark McGwire, Barry Larkin, Will Clark, and Oddibe McDowell.
In 1983, Hoover pitched the opening game at the IX Pan American Games, for an 8-0 victory over the Dominican Republic, helping to win the gold medal for the United States team.
Hoover played for the Texas Rangers in the 1990 season, but had a shortened pro-baseball career due to injuries sustained as a college player. He died on July 8, 2014 apparently of natural causes.