Birth Name: Jason Paul McCaslin
Place of Birth: North York, Ontario, Canada
Date of Birth: September 3, 1980
Ethnicity: Irish, Swedish
Jason McCaslin is a Canadian musician, singer, songwriter, and record producer. He is the bassist and co-vocalist of the rock band Sum 41. Other members of the band are or have been Dave Baksh, Steve Jocz, Tom Thacker, Deryck Whibley, and Frank Zummo.
He is the son of Sharon and Paul McCaslin.