Dan Haren finishes 12-13, might not be back with Angels

— 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 that can be bought out for $3.5 million.

“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, who grew up in the San Gabriel Valley and was thrilled when he was traded to the Angels in 2010, said he would consider returning to the Angels on a restructured, cheaper one-year deal.

“I’m not looking to break the bank, I’m not looking to sign a Zack Greinke deal,” Haren said. “I’m looking for whatever is fair. I’ll have to see what happens. Players work hard to get to free agency. I’ve played nine years, and if I become a free agent, it would be stupid not to take advantage of that.”

Wilson surgery

Pitcher C.J. Wilson revealed late Monday night that he will undergo arthroscopic surgery to remove bone spurs from his elbow, a condition that has bothered the left-hander since the All-Star break.

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, including pitching coach Mike Butcher and first-year hitting coach Jim Eppard, will return in 2013.

mike.digiovanna@latimes.com