Inside SMU Football Summer Workouts with Shawn Griswoldby:Billy Embody•06/24/25•BillyEmbodyRead In AppSMU strength coach Shawn Griswold. (Matt Visinsky / On3)Billy Embody talks with SMU strength and conditioning coach Shawn Griswold, who breaks down summer workouts for Rhett Lashlee's Mustangs.