I'll Have Another, here crossing the finish line in the Kentucky Derby, will miss the Belmont Stakes due to a leg injury (Kentucky National Guard Public Affairs Office/Wikimedia Commons)

Trainer Doug O’Neill and owner J. Paul Reddam decided to retire the three-year-old colt after learning about the injury, according to The New York Times. I’ll Have Another was on the track 5:30 a.m. Friday and came back with some swelling. An ultrasound examination revealed that the horse had early signs of tendonitis in his left front tendon.

I’ll Have Another is the 12th horse since Affirmed, the last Triple Crown champion, to win the Kentucky Derby and Preakness Stakes, but not the Belmont. The colt could be valuable as a stallion, having gone undefeated in four starts this year.

Read more at The New York Times.

Reach Executive Producer Danny Lee here; follow him here.