FORT MYERS, Fla. -- Right-hander Deolis Guerra returned to the Twins' Spring Training complex on Friday after suffering an injury while with Team Venezuela in the World Baseball Classic.

Guerra pitched in an exhibition game for Venezuela against the Mets in Port St. Lucie on Wednesday, and he gave up two runs on three hits in one inning.

Initial reports in Spanish indicated that he injured his right pectoral muscle, but Twins general manager Terry Ryan said he hasn't heard anything from the club's doctors yet. Guerra was set to be checked out by the club's medical staff on Friday.

"I don't want to give the wrong information," Ryan said, "but it's not a secret. He's back home and has some discomfort."

Guerra, who was acquired by the Twins in 2008 in the trade that sent Johan Santana to the Mets, had a 4.11 ERA with 71 strikeouts in 70 innings split between Double-A New Britain and Triple-A Rochester last season.

Guerra's not on the club's 40-man roster, as he was expected to start the season at Triple-A Rochester.

Injured outfielders could return to action this weekend

FORT MYERS, Fla. -- General manager Terry Ryan said injured outfielders Chris Parmelee, Darin Mastroianni and Oswaldo Arcia could all return to action this weekend.

Parmelee, who was a late scratch from Thursday's lineup because of right groin tightness, could return to action by Sunday against the Pirates at Hammond Stadium.

"He's OK now," Ryan said. "We'll give him another day, but he's fine."

Mastroianni, who has been out since Feb. 28 with tightness in his left hamstring, has been cleared by team doctors and is expected to play on Saturday against the Pirates in Bradenton. Mastroianni who is competing for the center-field job with Aaron Hicks and Joe Benson, was faring well before his injury with a .364 average in five games.

"Mastroianni is ready to go," Ryan said. "I'm anxious to see Mastroianni back to see what he's capable of doing."

Arcia, who is ranked the club's No. 5 prospect by MLB.com, has yet to play in a Grapefruit League game because of a pulled intercostal muscle. He has been taking batting practice and could make his debut on Saturday or Sunday.

"Arcia is pretty close," Ryan said. "Arcia is hitting today, so he's taking the proper steps. I think he'll get in a game shortly."