MINNEAPOLIS -- Twins right-hander Nick Blackburn is scheduled to undergo surgery on his right forearm on Friday to relieve pressure stemming from an entrapped nerve in his right forearm muscle.

Blackburn said the recovery time is six to eight weeks, and that it won't affect his normal offseason throwing program.

"I usually don't start throwing until around Christmas so even if I didn't have the surgery I wouldn't have started throwing any earlier," said Blackburn, who will have his forearm operated on by Dr. Thomas Varecka. "So this will work with the timing because I'll be done rehabbing by the time I start throwing. So it won't be a concern next year."

Span out of final game after rough play

MINNEAPOLIS -- Twins center fielder Denard Span was held out of the starting lineup on the final day of the season after crashing into the center-field wall on Tuesday, but came up with a pinch-hit double in the ninth inning and scored the winning run in the Twins' 1-0 win over the Royals on Wednesday.

Span, who has been dealing with migraines stemming from his concussion suffered on June 3 in a home-plate collision, said before the game that he planned to sit out for precautionary reasons.

But he ended up serving as a pinch-hitter with one out in the ninth inning, and laced a double off reliever Blake Wood before eventually scoring on a walk-off single from Trevor Plouffe that helped the Twins avoid their 100th loss.

"It was a good feeling," Span said. "Before the game started, I said how me coming back and playing the games I had before was the highlight of my season but definitely tonight was. I wasn't expecting to come off the bench, and so to come up and get a big hit like that was very huge for me."

Span played in five games in late September after being shut down for a little more than a month with migraines after he initially returned from his concussion in early August. Span hit .278 (5-for-17) with two triples and two doubles in those five contests, and said it gives him plenty of optimism heading into next year.

"It made my season," Span said. "It meant a lot for me to come back, just to see if I could come back from something of this magnitude. So for me, I couldn't have asked for more."

Morneau back with Twins to watch finale

MINNEAPOLIS -- Twins first baseman Justin Morneau was back at Target Field for the season finale on Wednesday, and said the surgeries on his left knee and right foot on Sept. 19 went well.

Morneau, who was officially shut down for the season on Sept. 18, played his final game on Aug. 18 when he re-aggravated his concussion symptoms while diving for a ground ball.

"It's cleaned up," Morneau said of the surgeries that removed a cyst from a his left knee and a spur from his right foot. "I'm feeling better already."

Morneau said he's confident that he'll be healthy heading into next year, and he plans on utilizing the offseason to try to shake symptoms dating back to his concussion on July 7 of last year.

"I'm not back to normal yet, but from a year ago to where I am today it's not even close," Morneau said. "Hopefully, I'll get some good rest this offseason and I can get back on the program and be strong going into the offseason."