Johnny Manziel Shows Off Arm At University Of San Diego Pro Day (VIDEO)

Comeback SZN continues for Johnny Manziel, who threw in front of NFL personnel for the first time in recent memory on Thursday at University Of San Diego's Pro Day.

The former Heisman Trophy winner made the appearance as a favor to USD players he'd been training with in the San Diego area. 

Manziel reportedly looked sharp. He threw 38 passes in front of 13 NFL teams, and only missed two throws.

Check out some of the highlights below.

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