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Updated: May 17th, 2013 11:58pm
Notebook: Mastroianni's time sidelined extended, will undergo surgery

Notebook: Mastroianni's time sidelined extended, will undergo surgery

by Brandon Warne
1500ESPN.com
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MINNEAPOLIS -- The Minnesota Twins announced Friday center fielder Darin Mastroianni would have surgery on his left ankle next Wednesday to repair a bone chip.

"(Twins team) Doctor Steubs kind of spearheaded it," assistant general manager Rob Antony said. "He talked to a couple different foot specialists, and they looked at everything and determined that they need to go in and repair a little chip on the inside of his left ankle."

Antony noted the stress reaction had healed some, but there was a chip in near a ligament that was giving Mastroianni additional trouble. Not everyone is affected the same way by the chip, but it was causing significant discomfort to Mastroianni when he ran, and it was deemed that a procedure would be necessary.

The Twins are optimistically hoping he'll be back on the field in six weeks, but that would just be the start of a rehab stint, which would have to be lengthy based on how little Mastroianni played in games this spring.

The Twins remained non-committal about putting Mastroianni on the 60-day DL, or about addressing the backup center field position.

"We'll continue to see if we need to do that," Antony said. "He's been out basically all year, and we've been going along. We haven't had an issue with that. I'm not sure that we're real worried about the depth right now."

Twins part ways with Perez

The Twins released left-handed reliever Rafael Perez from Triple-A Rochester Friday.

"It didn't look like he was going to be ready to come up here and help us, and we needed to make a decision," Antony said. Perez and the Twins both agreed he wasn't ready by May 1 -- the original opt-out date in his deal -- but that June 1 was a more fair date to shoot for.

The club felt if a move was going to be made, that Perez wouldn't be the preferred candidate, so they released him so he could land with someone else in a timely fashion. A corresponding move was not immediately announced, as the player had not yet been notified per Antony.

Perez was a tremendous left-handed reliever for the Indians, but hasn't been effective -- or healthy for that matter -- at the big league level since 2008. His best season came in 2007, when he had a 1.78 ERA in 44 appearances (60.2 IP) while fanning 9.2 hitters per 9 innings. Perez had made four appearances at Rochester, allowing one earned run in four innings with two strikeouts and three walks.

Notes

* Tim Wood was in the clubhouse prior to Friday's game. He was in Minnesota to see team doctors, specifically to have his MRI arthrogram read Friday. Wood suffered a setback in his rehab stint (shoulder), and may also be a candidate for the 60-day DL should the Twins choose to add Clete Thomas, Samuel Deduno, or any other non-roster player to the 40-man roster, per Antony.

* Cole De Vries feels fine physically as he works his way back from a forearm strain; he just didn't pitch well last time out for Rochester.

"I talked to (Triple-A manager) Gene Glynn, who said he was aggressive and using all of his pitches, he was just up in the zone," Antony said.

De Vries only went four innings, giving up six runs (all earned) on 11 hits. De Vries will take his turn in the Red Wings rotation again before the Twins evaluate where he'll be officially assigned after his rehab stint.

• Antony had a similar assessment of the Mauer injury situation as manager Ron Gardenhire.

"Mauer came in with a little bit of a stiff back this morning," Antony noted. "Gardy said he's not going to start him, so the trainers are going to work on him. He may or may not be available but they didn't seem to be too concerned about it."

It wasn't entirely clear if Mauer would catch in an emergency. The team unofficially lists Eduardo Escobar as its emergency catcher.

• Two stars of the movie "The Sandlot" are in town to help commemorate the 20th anniversary of the cult classic film. Ham, portrayed by Patrick Renna, and Squints, portrayed by Chauncey Leopardi, are both in town as the Twins will show the movie on the big screen following Sunday afternoon's contest. Twins president Dave St. Peter announced that concession stands would remain open during the movie showing, but no alcohol would be served.

Numbers Game

80 - Number of runs the Twins offense has scored in May. This ranks the Twins third in baseball, behind the Tigers and Rays.

.331 - The Twins' BABIP (batting average on balls in play) in May, second-highest in all of baseball.

.435 - The Twins' slugging percentage in May, eighth-highest in the MLB.

42.7% - The Twins' groundball rate in May, fifth-worst in all of baseball. Essentially, this suggests a seismic shift from what was expected from this pitching staff at the outset of the season.

2.4 - The number of walks per nine innings that Twins pitchers have allowed in May, best in MLB.

5.7 - The number of strikeouts per 9 innings that Twins pitchers have recorded in May, worst in MLB.

Brandon Warne covers the Minnesota Twins for 1500ESPN.com. He has also contributed as a baseball analyst for Fangraphs.com and BaseballProspectus.com
Email Brandon | @Brandon_Warne
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