Prior to his spell in NFL Europe (1996) with the Scottish Claymores McCallum had been playing with the Riders, upon his return to Canada he resigned with the Saskatchewan Roughriders and tore his ACL early in the into the CFL season. After recovering he returned to play for the club until 2000 at which time he left to sign with the Las Vegas Outlaws of the XFL for their 2001 football season.
