Limas Sweed -- a former University of Texas football star -- says he's suffering from serious brain disorders as a result of hits from his college football career ... and now he's suing the NCAA.
Sweed was a STUD wide receiver for the Longhorns from 2003 to 2007 -- when he and Vince Young led the team to some epic victories, including that legendary 2005 Rose Bowl win over USC.
After his college career, Sweed was selected by the Steelers in the 2nd round of the '08 NFL Draft -- but his pro career never panned out.