BALTIMORE (AP) _ The Baltimore Orioles put Mike Mussina on the 15-day disabled list Friday and remained hopeful the right-hander will miss only two starts because of a painful wart on the index finger of his pitching hand.

Mussina gave up five runs and eight hits, including three homers, in five innings of an 8-2 loss to the Chicago White Sox on Thursday. After the game he revealed that he had been bothered by the wart since spring training and that it had cracked open early in the game.

``It's gotten too frustrating to deal with. I just can't go out there like this,'' Mussina said.

Orioles manager Ray Miller indicated Thursday that Mussina would miss at least one turn in the rotation and would likely be placed on the disabled list. After assessing the situation Friday, Miller made the move.

``If I'm going to lose Mike, I'd rather lose him up front,'' Miller said. ``I don't care if we're 10-4 or 4-10.''

Baltimore brought a 10-4 record into Friday night's game at Texas.

Baltimore called up right-handed pitcher Sidney Ponson from Triple-A Rochester. It was unclear whether Ponson, who has never pitched in the majors, would replace Mussina in the starting rotation.

Ponson, 21, pitched four shutout innings for the Red Wings in his only appearance this season.

Mussina, 29, is a four-time All-Star and the ace of the Orioles' staff. He had not allowed a home run in three starts this season before Thursday.

``It's much better to miss a start or two rather than to continue to throw like this and risk hurting my arm,'' Mussina said. ``It's become a big part of just about every pitch, and I want to fix it before it causes something major.''