It appears two more Alabama underclassmen are leaving the Tide and entering the NFL draft.

Junior left tackle Cam Robinson is turning pro, sources told AL.com. Sources have also told AL.com throughout the week that cornerback Marlon Humphrey is expected to leave Alabama and enter the draft barring a late change of plans.

Robinson won the Outland Trophy this past season, which is given to the nation's top interior lineman.

The Louisiana native was a first-team All-SEC selection each of the last two years.

Humphrey, a two-year starter, had 36 tackles and two interceptions as a redshirt sophomore this past season.

CBS Sports ranks Robinson as the top offensive tackle and 14th-best overall NFL prospect among draft-eligible players. Humphrey is ranked as the second-best cornerback and the 20th-best overall prospect.

This means that at least three Alabama underclassmen are expected to declare for the draft.

Wide receiver ArDarius Stewart is the other, as AL.com reported Wednesday night.