Interesting and good question. It seems there are multiple answers though as Sanders and Peete also fit the criteria in the 1989 draft (although I erroneously put the year they competed for the Heisman).
Well done, Flotsam! I figured this one would give people some fits since both Wuerffel and Davis are virtually forgotten here in the NFL. Though, I understand Davis is quite the CFL stud, winning the Grey Cup in 2005.