Dan Haren ends season on a down note

SEATTLE — In what was probably Dan Haren’s last game in an Angels uniform, the right-hander gave up five runs — three earned — and seven hits and struck out eight in six innings of a 6-1 loss to Seattle in Safeco Field on Tuesday night.

Haren, slowed by lower-back tightness in the first half, finished with a 12-13 record and 4.33 earned-run average, and the Angels, mindful of his high mileage and decreased velocity, are not expected to pick up his $15.5-million option for 2013.

“One last time?” Haren said as reporters approached him afterward. “Definitely, the thought has crossed my mind. Part of me feels a little guilty because of the way this year went. If I would have had my average year, we’d probably be where we want to be.”

Haren said he would consider returning to the Angels on a restructured, cheaper one-year deal.

Wilson surgery

Pitcher C.J. Wilson revealed late Monday that he will undergo arthroscopic surgery to remove bone spurs from his elbow.

Wilson went 9-5 with a 2.43 ERA in the first half. But he went 4-5 with a 5.54 ERA in the second half and finished with a 13-10 record and 3.83 ERA.

The bone spurs limited Wilson’s range of motion and forced him to make “a million adjustments to get around it,” he said. “But I had a similar procedure after 2008 and bounced back pretty well.”

Short hops

General Manager Jerry Dipoto said the entire coaching staff will return in 2013.

mike.digiovanna@latimes.com