Twins outfielder Josh Willingham has a torn meniscus as well as a bone bruise. He was willing to rest the knee and try to play until he could have offseason surgery, but the bone bruise wasn’t going away any time soon.

So Willingham decided to have surgery on Wednesday to repair the medial meniscus tear in his left knee and will be out four to six weeks.

“We met with the doctor and read the MRI,’’ Willingham said. “There’s a bone bruise, which would take a minimum of two weeks, probably like three or four, to heal. And the cartilage tear that was there before had a little bit of change and maybe had gotten a little bigger. We thought the procedure, which would take four, maybe six weeks to return from, would kill two birds with one stone.’’

Dr. John Steubs, the team’s director of medical services, will perform the surgery.

The day began with Willingham landing on the 15-day disabled list, because the Twins hoped rest and rehab would be the solution. But Willingham and Steubs spoke during the game and decided on surgery.

In 70 games, Willingham is batting .224 with 10 home runs and 37 RBI, a huge letdown from last season, when he went .260-35-110 and was a force in the middle of the order.

Any chance of Willingham being a trade chip before the July 31 trade deadline has been destroyed as well.