Brett Dietz (born October 8, 1981) is American football coach and former quarterback. He is the head football coach at DePauw University in Greencastle, Indiana, a position he has held since 2020. Dietz played college football at Hanover College in Hanover, Indiana and professionally with several teams in the Arena Football League (AFL), Af2, and the National Indoor Football League (NIFL) including the Cincinnati Marshals, Louisville Fire, Tampa Bay Storm and California Redwoods.