Manager Joe Girardi said that Mitre felt something in his side while hitting on Sunday, in preparation for New York's upcoming Interleague road slate against the D-backs and Dodgers.
Girardi said that Mitre "felt a lot worse" when warming up on Sunday and did not report much improvement when he came in for treatment on Monday at Yankee Stadium.
"The doctors felt that it would be more than a couple of days -- maybe not the whole two weeks, but we'll have to wait and see," Girardi said. "Obliques are funny. That's the thing that managers, when you're an American League club, don't like about Interleague."
Mitre was 0-1 with a 2.88 ERA in 12 games (two starts) for the Yankees this season. In a corresponding roster move, the Yankees recalled left-hander Boone Logan from Triple-A Scranton/Wilkes-Barre.
Logan had no record and a 5.06 ERA in 13 appearances this year for New York, after narrowly missing the Opening Day roster out of Spring Training. He had a 1.32 ERA in nine outings at Triple-A.
"Boone has been throwing the ball well down there," Girardi said. "With the Phillies and their left-handed power, we thought we'd bring another lefty in."
-- Bryan Hoch