The Cardinals announced Isringhausen's test results following Tuesday's game against Pittsburgh. Manager Tony La Russa anticipates that Isringhausen will miss the remainder of the season.
"I think so," La Russa said when asked if he thought Isringhausen was out of the picture for the rest of '08.
Isringhausen's last outing was on Saturday in Cincinnati. He allowed one hit and no runs in one inning while picking up a hold.
La Russa said he spoke with Isringhausen on Tuesday afternoon.
"I definitely believe he could pitch next year," La Russa said.
No ligament damage was found during Isringhausen's exam.
"It's unfortunate," Cardinals starter Braden Looper said. "He's a guy who has been here for a long time. My heart goes out to him because I know what he has gone through this year and continued to try to battle."
Robert Falkoff is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.