Wisconsin quarterback Graham Mertz announced earlier this week that he has created his own logo for merchandise that he plans to sell as new name, image and likeness rules go into effect. Now an even higher-profile signal-caller has joined the fun. 

Oklahoma quarterback Spencer Rattler -- the Heisman Trophy favorite entering the season according to William Hill Sportsbook -- announced on Twitter that he has created a new logo for his own personal brand. The logo is a combination of his initials (S.R.) with -- you guessed it -- a rattlesnake serving as the "S."