Astros LHP Andy Pettitte has a strained muscle in his left forearm and will be evaluated by team doctors in the next few days.

Pettitte left four innings into Wednesday night's game against the Cubs with discomfort in the forearm. He was clearly distressed by the end of the fourth, wincing in pain as he walked off the mound to end the inning.

He allowed one run and two hits in four innings.

Team officials said Pettitte is considered day-to-day but likely will be able to make his scheduled June 4 start against Pittsburgh.

* CATCHING UP: Red Sox RF Trot Nixon went 0 for 3 with a walk and made two catches in an extended spring training game in Fort Myers, Fla.

Nixon went on Boston's disabled list with a mildly herniated disc in his lower back in spring training, then pulled a muscle in his right thigh. He is scheduled to play again Saturday.

* ON THE MOVE: The Padres placed RHP Jake Peavy on the 15-day disabled list because of a strained tendon in his right forearm. The move was made retroactive to May 20. . . .

The Twins activated 3B Corey Koskie from the 15-day disabled list. Koskie had been on the DL since May 12 with a strained sternum.

-- From News Services