The fire occurred after 10 p.m. in a tack room. The fire spread to the adjoining stall occupied by the gelding. Pappa Portmore was claimed for $5,000 Dec. 1 by trainer Anthony Farrior for owner Super C Racing. The son of Good Reward had won six of 18 starts, including that final race.
There was no structural damage to the fire-retardant barn. The cause of the fire is being investigated.
"I speak for everyone at Laurel Park and the Maryland Jockey Club when I say how devastated we all are by this loss," said Sal Sinatra, president and general manager of the Maryland Jockey Club. "The safety of our horses is our priority at all our tracks. One loss is too many."
Pappa Portmore won four of his first five career starts and placed third in the 2013 Traskwood Stakes at Aqueduct Racetrack. He earned $132,430.