A no-hitter is a complete baseball game in which the pitcher yields no hits to the opposing team, while pitching a minimum of nine innings and completing the entire game. However, the opponent still may reach base any number of times by walk or error.
As of 2014, there have been 285 no-hitters thrown in Major League Baseball history. Remarkably, Ken Johnson tossed a no-hitter in 1964 and his team still managed to lose the game, thanks to two errors that allowed a run to score. In 2003, a record six Houston Astros pitchers combined for a no-hitter against the New York Yankees. As of 2014, Nolan Ryan holds the MLB record with seven no-hitters in his career with the California Angels, Astros and Texas Rangers.