KNOXVILLE, Tenn. (WVLT) -- Just three days before Derek Dooley signs his 2012 class, a major recruit has decommitted.

Per orangebloods.com (the Texas Longhorns Rivals' recruiting site), linebacker Dalton Santos, a Tennessee commitment since August, has flipped his decision and will now attend Texas.

"He committed to Texas this morning and he's fired up to be a Longhorn," Santos' father, Albert Santos, told the website.

Santos, 6'3", 250 pounds, is rated by Rivals as a 4-star prospect.