Garry Peterson

Garry Denis Peterson (born May 26, 1945) is a Canadian-American retired drummer. Peterson was originally a "child prodigy" drummer, backing many popular acts in the 1950s, but is best remembered as an original member of the Guess Who. Being the longest-serving member of the group, he was the band's drummer from 1962 to 1975 and appeared with the band for several periodic reunions until 2003.

He later joined Bachman–Turner Overdrive until he was fired a few years later. He subsequently joined an unauthorized Guess Who band put together by original bassist Jim Kale. This version of the band toured and recorded for over 40 years until being stopped in 2024 by lawsuits from Burton Cummings and Randy Bachman.