Toronto Blue Jays prospect Tom Robson never felt the popping sensation associated with a torn ulnar collateral ligament.
Instead, the right-hander — who will have Tommy John surgery in Pensacola, Fla., on Tuesday — experienced a nagging discomfort that simply wouldn't go away.
"I woke up with it one day and it never got better," said Robson, whose surgery will be performed by the renowned Dr. James Andrews. "It had been something that was bothering me for a while, so I knew it wasn't right."
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