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10/10/09 6:47 PM ET

De La Rosa could return for NLCS

If Rox advance, lefty might come back from tight groin

DENVER -- On a day of snow and record cold, the Rockies' possible future turned warmer.

Left-hander Jorge De La Rosa, who is missing the National League Division Series against the Phillies because of left groin tightness, threw indoors at Coors Field on Saturday and should be available should the Rockies advance to the NL Championship Series.

Major League Baseball pushed Game 3 of the Phillies-Rockies series -- tied at a game apiece -- from Saturday to Sunday because of snow and record-cold temperatures. But the Rockies conducted a 90-minute indoor workout. It was there that De La Rosa threw a bullpen session for manager Jim Tracy.

"Jorge ran yesterday and threw a bullpen today, and as I sat there, he threw the ball very well," Tracy said by phone. "From what I saw, if we are fortunate enough to advance to a National League Championship Series, his is a name that we can re-enter into the discussion."

In a breakout season, De La Rosa overcame an 0-6 start to finish the year 16-9 with a 4.38 ERA. His win total was one shy of the club record, shared by Kevin Ritz (1995), Pedro Astacio (1999) and Jeff Francis (2007).

De La Rosa led NL left-handers in wins, and his 193 strikeouts led the league's lefties and was a Rockies record for a southpaw. However, De La Rosa left his final start of the regular season, last Saturday against the Dodgers, with a groin strain after throwing three perfect innings.

Originally, De La Rosa was going to throw a bullpen session the day before the series with the Phillies began. But the groin had not improved, so the Rockies called off the session in hopes that De La Rosa's condition would improve with added rest.

Thomas Harding is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.