The NFL has been told "it is safe" for Utah defensive tackle Star Lotulelei "to participate in professional athletics without restrictions," according to a letter provided to teams that was written by Dr. Josef Stehlik of University of Utah Cardiology.

Lotulelei is one of the top prospects in the upcoming NFL draft but he was prohibited from working out at the NFL scouting combine after a heart concern was flagged.

Stehlik writes in the letter that Lotulelei's abnormal test result may have resulted from a viral infection and that subsequent tests have shown a "complete normalization of the heart muscle function."

Lotulelei participated at Utah's pro day last month and tested well across the board. The 6-foot-2, 311-pound Lotulelei unofficially recorded a 30-inch vertical leap, registered 38 reps of 225 pounds in the bench press and clocked a 4.65 time in the shuttle run.