DENVER -- As if losing a late lead Sunday wasn't bad enough, the Padres could potentially be without the services of one of their hottest hitters, rookie second baseman Jedd Gyorko.
Gyorko suffered an undisclosed right groin injury running between first and second base in the 10th inning of the Padres' 8-7 loss to the Rockies at Coors Field.
"It's a little concerning," said Padres manager Bud Black. "We don't know if it's a cramp, strain or a pull. We'll know more when this thing sets up in 24 hours."
Gyorko went 1-for-5 in the 10-inning loss to the Rockies, a game that saw the Padres lose a three-run lead in the ninth inning before Dexter Fowler's single won it in the 10th.
Gyorko is hitting .284 this season and leads all Major League rookies with 66 hits. He also leads the team in home runs (eight) and RBIs (25) in 60 games.
"Hopefully, it's just a cramp," he said. "It happened on the last step before I slid. When I got inside the dugout, it spasmed pretty bad."
If Gyorko misses any time -- the Padres open a series on Monday at Petco Park against the Braves -- the team could use utility man Alexi Amarista at second base, but they'd likely need to add another infielder to take Gyorko's spot on the active roster.