Jamie Moyer (born November 18, 1962) is an American former professional baseball pitcher.

At the time of his last game, he was the oldest player in the major leagues and had the most wins, losses, and strikeouts of any active Major League pitcher. He has been likened to Phil Niekro.[1][2][3] On April 17, 2012, Moyer became the oldest pitcher in MLB history to win a game. On May 16, 2012, he broke his own winning-pitcher record and also set the record for the oldest major-league player to record an RBI.

Moyer has pitched for the Chicago Cubs, Texas Rangers, St. Louis Cardinals, Baltimore Orioles, Boston Red Sox, Seattle Mariners, Philadelphia Phillies, and Colorado Rockies. He made the All-Star team in 2003, while with the Mariners. Moyer has received numerous awards for philanthropy and community service, including the 2003 Roberto Clemente Award, the 2003 Lou Gehrig Memorial Award, the 2003 Hutch Award, and the 2004 Branch Rickey Award. Moyer is one of only 29 players in baseball history to date to have appeared in Major League games in four decades.