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9/9/2013 6:36 P.M. ET

Parmelee among Twins' Triple-A callups

MINNEAPOLIS -- The Twins officially added seven players to their roster Monday, a day after Triple-A Rochester was eliminated by Pawtucket in the International League playoffs.

The Twins recalled infielder Eduardo Escobar, first baseman/outfielder Chris Parmelee, left-hander Scott Diamond and right-handers Michael Tonkin and Cole De Vries. Additionally, the Twins selected the contracts of catcher Eric Fryer and right-hander Shairon Martis.

Parmelee was thrown right into the fire, as he started in right field and batted eighth against the Angels. Parmelee, 25, hit .231/.318/.370 with three homers and 13 doubles in 45 games in Rochester after being optioned at the All-Star break. He hit .223/.303/.372 with eight homers and 12 doubles in 83 games with the Twins before being optioned.

"While I was down there, my numbers weren't where I wanted them to be, but overall I felt good," Parmelee said. "I felt pretty good at the plate and hit some guys hard right at some guys. So I'm not trying to dwell too much on numbers."

Parmelee, who impressed as a September callup with a .355 average in 21 games in 2011, said he was hoping to replicate that success this month. He knows he has a lot to prove, especially now that Justin Morneau was traded to the Pirates on Aug. 31 to create an opening at first base.

"Obviously there's a spot open, and I'm gunning for it," Parmelee said. "But I don't want any unneeded pressure on myself. I'm just going to go out there and put some good swings on the ball and try to drive some runs in."

Diamond to enter Twins' expanded rotation

MINNEAPOLIS -- The Twins are going to a six-man rotation, as left-hander Scott Diamond is set to start Thursday against the A's at Target Field.

Diamond, who was officially recalled from Triple-A Rochester on Monday, will start on normal rest and will be slotted between right-handers Mike Pelfrey and Kevin Correia.

Diamond pitched well with Rochester after being optioned by the Twins in early August, as he posted a 2.02 ERA in six starts, including a strong outing in the International League playoffs.

"He did fine," Twins manager Ron Gardenhire said. "I watched some games. His location was better, and his breaking ball was a little sharper. But what he did down there, it has to translate up here, or else it doesn't mean anything. He can't get behind the count and not finish his pitches off."

Right-hander Cole De Vries, who was also officially recalled from Rochester on Monday, will pitch out of the bullpen for now, but Gardenhire did not rule out De Vries joining the rotation this year. Pelfrey is coming off Tommy John surgery and will be monitored the rest of the season, while left-hander Andrew Albers has already thrown a career-high 178 innings after throwing 103 innings last year.

"De Vries is starting in the bullpen, but if we want to slot him in there, we can take someone out," Gardenhire said. "We do have guys who are running up on innings that we're nervous about."

Worth noting

• Gardenhire said Ryan Doumit was done catching this year and would be used only as a designated hitter and outfielder. Josmil Pinto, Chris Herrmann and Eric Fryer will split catching duties in September.

• With Triple-A Rochester being eliminated in the International League playoffs Sunday, the Twins' Minor League season is now complete. The Red Wings, who went 77-67, were one of five affiliates to post a winning record this year, joining Class A Advanced Fort Myers (79-56), Class A Cedar Rapids (88-50), Rookie-level Elizabethton (37-31) and the Dominican Summer League Twins (36-33). Double-A New Britain went 66-76, and the Gulf Coast League Twins went 28-32.

• The Twins announced their rosters for the instructional league. Notable players set to participate are pitchers Alex Meyer, Jose Berrios, Kohl Stewart and Stephen Gonsalves. Other notable prospects include third baseman Travis Harrison, infielder Niko Goodrum and outfielder Adam Walker.

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.