William Derek Grimm (born August 3, 1974) is an American professional basketball player.

A 6'9" forward from the University of Missouri, Grimm was never drafted by a National Basketball Association (NBA) team but did play for the Sacramento Kings during the 1997–98 NBA season.

Born in Peoria, Illinois, he was selected by the La Crosse Bobcats in the fifth round (50th overall) of the 1997 CBA Draft.

[3] He has also played professionally in the IBL, Turkey, Kosovo, Philippines, Poland, Netherlands, and Japan.

This biographical article relating to a United States basketball player, coach, or other figure born in the 1970s is a stub.