FORT LAUDERDALE, Fla. — Baltimore Orioles pitcher Koji Uehara was expected to miss his next scheduled start after straining his left hamstring during Monday's game against the New York Mets.

Uehara, the first Japanese pitcher signed by the Orioles, apparently got hurt while covering first base. He was scheduled to go four innings, but came out after two.

"He probably will be backed up from the next time he pitches by two or three days," manager Dave Trembley said Tuesday. "I think instead of him pitching on five days' rest, it probably will be seven."

The injury is not believed to be serious.

Uehara received treatment on his left leg in the trainer's room Tuesday at Fort Lauderdale Stadium while the Orioles traveled to Fort Myers to play the Boston Red Sox.

"The report I got last night is there's nothing to be concerned about," Trembley said.

Known for his impeccable control, Uehara walked two batters and threw 45 pitches in two innings against the Mets in Port St. Lucie. Thirty of those pitches came in his last inning, when he allowed three runs.

Projected as the Orioles' No. 2 starter behind Jeremy Guthrie, Uehara has a 6.75 ERA in two regular spring training starts and also pitched three scoreless innings against the Dominican Republic in an exhibition.