© 2013 MLB Advanced Media, L.P. All rights reserved.

8/30/2013 7:36 P.M. ET

Twins place Deduno and Ramirez on 15-day DL

Minnesota recalls Hernandez from Double-A, Mastroianni from Triple-A

ARLINGTON -- The Twins made several roster moves Friday after losing two players to injury in Thursday's 3-1 loss to the Royals.

Outfielder Wilkin Ramirez (fractured left tibia) and right-hander Samuel Deduno (right shoulder soreness) were placed on the 15-day disabled list. The Twins recalled outfielder Darin Mastroianni from Triple-A Rochester and left-hander Pedro Hernandez from Double-A New Britain to take their spots on the roster.

Ramirez, who fouled a ball of his shin on Thursday, won't need surgery but will miss the rest of the season with his injury. Ramirez finishes the year hitting .272/.302/.370 with six doubles, a triple and six RBIs in 35 games. He also missed 69 games after suffering a concussion in late May.

"It's sad," Twins manager Ron Gardenhire said. "He was just coming off that concussion thing. It's been a tough year for him with all the injuries he's had."

Deduno had an MRI exam on Friday that showed issues with his labrum and rotator cuff. The Twins remain hopeful Deduno can avoid surgery, and he's scheduled to meet with Dr. Pearce McCarty in Minnesota on Saturday. Deduno, who has been battling biceps tendonitis over his last five starts, has a 3.83 ERA in 18 outings this season.

"Whether or not he's going to take the mound again this year we're going to have to get him looked at first," Twins general manager Terry Ryan said. "At this point in the year we're not going to rush him back by any means."

Hernandez could take Deduno's place in the rotation on Tuesday but will be available out of the bullpen in long relief until then in case he's needed. He has a 5.54 ERA in nine appearances with the Twins this year, and is coming off a forearm strain suffered in July.

"Pedro is in the bullpen right now but we'll work on Tuesday over the next couple days," Gardenhire said.

Mastroianni, who began the year with Minnesota, has missed most of the season with a stress reaction in his left ankle stemming from a foul tip off his ankle late in Spring Training. But he's back up with the Twins after hitting .240/.397/.260 in 15 games at Triple-A Rochester, and started in right field against the Rangers on Friday.

"It's been a long season," Mastroianni said. "It's just nice to be back up here with these guys. It was excited to be told last night I'd be back here. I'm just looking forward to finally being healthy and being able to play again this year."

Willingham staying put, pulled off waivers

ARLINGTON -- Josh Willingham is still a member of the Twins.

The left fielder was pulled back off waivers by the Twins, as the club was unable to work out a deal with the Orioles before Friday's deadline. The Orioles claimed Willingham off waivers on Wednesday, but they ended up working out a deal with the Mariners for first baseman/outfielder Mike Morse instead.

Willingham, who is also under contract for $7 million next year, now can't be traded to any club this season.

"I'm just glad it's over," Willingham said. "Now I know where I'm going to be."

Willingham said he knew a trade wasn't completed when he didn't hear anything from the Twins or his agent on Friday, but he was never officially notified by anyone he wasn't traded.

But he was happy to be in the Twins' lineup on Friday against the Rangers, and said he prefers staying with the club.

"I'm comfortable here, so I'd like to stay here," Willingham said. "The bottom line is I didn't have any control, so I didn't worry myself with it."

Worth noting

Joe Mauer, who is on the 7-day disabled list after sustaining a concussion on a foul tip while catching on Aug. 19, ramped up his exercises on Friday, according to general manager Terry Ryan. Mauer is expected to progress to hitting off a tee on Saturday.

• Outfielder Byron Buxton, ranked as the No. 1 overall prospect according to MLB.com, was named the Most Valuable Player and Prospect of the Year by the Midwest League on Friday. Buxton, 19, hit .341/.431/.559 with eight homers, 15 doubles, 10 triples and 32 stolen bases in 68 games with Class A Cedar Rapids before being promoted to Class A Advanced Fort Myers in late June.

• Right-hander Vance Worley had an MRI exam on his right shoulder, which didn't show any issues, but he will be shut down for the rest of the year, according to Ryan. Worley, who was acquired in the trade that sent Ben Revere to the Phillies, posted a 7.21 ERA in 10 starts with the Twins before being optioned to Triple-A Rochester on May 22. He fared better at Rochester with a 3.88 ERA in nine starts, but he last pitched on July 7 because of shoulder problems.

• The Twins completed their trade with the Royals from Aug. 11, as the Twins received an undisclosed amount of cash in exchange for infielder Jamey Carroll, according to Ryan.

Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.