Jason Andrew Varitek; born April 11, 1972 in Rochester, Michigan) is an American Major League Baseball catcher who is currently a free agent. After being traded as a minor league prospect by the Seattle Mariners, Varitek has played his entire major league career for the Red Sox. A three-time All-Star and Gold Glove Award winner at catcher and a Silver Slugger Award winner, Varitek was part of both the 2004 World Series and 2007 World Series Championship teams. In December 2004 he was named the captain of the Red Sox, only their third captain since 1923. He is a switch-hitter.

Varitek is one of only two players in the history of the sport to have played in the World Championship game of the Little League World Series, in the National Championship game of the College World Series, and in the Major League World Series (Ed Vosberg is the other). Varitek stands alone as the only baseball player in history to have played in the three aforementioned World Series along with playing on the Olympic Baseball team and in the World Baseball Classic. His Lake Brantley High School baseball team won the Florida State Championship his senior year in 1990 and was named the number one high school baseball team in the nation by a USA Today poll. Varitek has caught an MLB-record four no-hitters.