John William Grabow, nicknamed "Grabes" (born November 4, 1978, in Arcadia, California), is a Major League Baseball left-handed reliever for the Chicago Cubs.
Through 2009, he held opposing batters to a .218 batting average and a .293 slugging percentage when there were runners in scoring position. Also, from 2004–08, no lefty reliever in the National League made more appearances than Grabow. His 340 outings in that span ranked fourth in the majors.
Grabow grew up a Giants and Dodgers fan, playing first base and emulating Will Clark. He graduated from San Gabriel High School in California in 1997, where he pitched and was a 3-year letterman in baseball and named all-CIF (California Interscholastic Federation), as well as the league's MVP as a senior. He was drafted by the Pittsburgh Pirates in the 3rd round of the 1997 amateur draft.