Trotter had previously announced that he wasn't returning to Auburn for his senior season, but it was unclear what his plans were from there.
The SEC had 12 players on the early entry list released by the NFL. Another player on that list who previously played in the SEC was safety Janzen Jackson, who spent last season at McNeese State after being kicked off Tennessee's team.
Here are the 12 SEC underclassmen officially in the draft:
Michael Brockers, DT, LSU
Orson Charles, TE, Georgia
Morris Claiborne, CB, LSU
Fletcher Cox, DT, Mississippi State
Stephon Gilmore, CB, South Carolina
Dont'a Hightower, LB, Alabama
Alshon Jeffery, WR, South Carolina
Dre Kirkpatrick, CB, Alabama
Bobby Massie, OT, Ole Miss
Rueben Randle, WR, LSU
Trent Richardson, RB, Alabama
Barrett Trotter, QB, Auburn