John Grabow, American baseball player
John William Grabow, nicknamed "Grabes" (born November 4, 1978) is an American former professional baseball left-handed reliever. He played for the Pittsburgh Pirates and Chicago Cubs of the Major League Baseball (MLB).

In his MLB career, he held opposing batters to a .218 batting average and a .293 slugging percentage when there were runners in scoring position. He made 340 appearances between 2004–08, which ranks him fourth in the majors and first among left-handed relievers in the National League for that period.In nine years in the MLB he played in 506 games and had a 24–19 record, using a fastball, slider, and change up.