"I didn't lose sleep last night," Perkins said. "It's definitely better than I anticipated."
Manager Ron Gardenhire was slightly encouraged by the news about Perkins.
"He said he actually feels OK today," Gardenhire said. "But obviously, we're going to get him checked out."
Perkins said he had pain in a muscle in the back of his upper left arm, something he had never experienced previously.
"For all I know, it could be a few months, it could be two weeks," Perkins said. "It's one of those things you just don't know."
Said Gardenhire: "I've never seen that on a pitcher. I've never seen anything back there [on the arm] happen like that, and how that happens I can't tell you. He said it was on a sinker. The doctor said he'd seen it, but I've never seen it."
In the meantime, Minnesota will take a wait-and-see approach with Reyes before determining whether he needs to go on the disabled list.
"Everything is about getting back to Minnesota and checking everything out," Gardenhire said. "On Thursday, he's probably going to see a doctor. They're going to read his MRI and then make a decision on whether they're going to inject [cortisone] or whatever. That's probably going to end up putting him on the DL, too."
Pitching depth has become a real issue for the Twins.
"One thing I was concerned about in Spring Training was depth," Gardenhire said. "It all starts with our pitching. We just have to get more consistent pitching right now. We've got issues. We've got big issues."
To replace Perkins on the 25-man roster, Minnesota on Tuesday purchased the contract of left-handed pitcher Carmen Cali from Triple-A Rochester. The 28-year-old was 2-0 with a 2.70 ERA in 12 appearances for the Red Wings.
Cali became the eighth player already this season to be called up from Rochester. Six of those are still with the Twins, though two of them -- outfielder Josh Rabe and Perkins -- are on the disabled list.
Cali arrived in Texas on Tuesday afternoon, but his availability for that night's game was questionable considering that he threw 2 2/3 innings on Monday night.
"I could not sleep last night, I was just too excited," Cali said before Tuesday's game. "But I can go. Of course, I can go. I've got a lot of adrenaline here."
Mauer catches bullpen:
Catcher Joe Mauer continues to make progress recovering from his strained left quadriceps. He caught a bullpen session before Tuesday's game. It was his first bullpen session since suffering the injury.
"There's not much to tell you," Mauer said. "It was a good bullpen. It felt good to get out there."
Gardenhire is looking forward to getting Mauer's bat back in the lineup. But Gardenhire isn't willing to rush, and he also discounts the idea of using Mauer as a DH.
"We're going to make sure he can catch before we bring him back," Gardenhire said. "Running has been the biggest issue. It's not so much catching, it's running. I can envision doing anything to get his bat back in here, but I don't want to bring him back and say 'You're going to DH for a while.' He needs to catch. That way we know he's healthy."
Defense hasn't been the downfall of the Twins so far this season. Through 44 games, Minnesota was second in the American League behind only Baltimore in fielding percentage at .987. Minnesota outfielders had recorded a league-high 15 assists.
Luis Castillo continues to be a major part of the Twins defensive prowess. Entering Tuesday, the second baseman had not committed an error since May 29, 2006 -- a stretch of 130 games. That is a Major League record for the position. During the span, Castillo had turned 67 double plays and recorded 354 assists and 240 putouts in 594 total chances.
Twins right-hander Boof Bonser (2-1, 3.91) takes on the Rangers to close out the three-game series at 1:05 p.m. CT Wednesday. It will be Bonser's first career start at Rangers Ballpark in Arlington. Right-hander Robinson Tejeda (4-3, 4.53) will start for the Rangers.