ANAHEIM -- Rangers outfielder Josh Hamilton moved from center to left in the fifth inning and then exited entirely in the bottom of the seventh Friday night because of right patella tendinitis.

Hamilton has battled tendinitis in the knee this season and said he would arrive early for treatment on Saturday in hopes of returning to the lineup.

"Just calling it tendinitis right now," said Hamilton, who was 1-for-3 with an RBI, a run and a walk in the 9-7 loss. "It was just hurting before everything started up today. Before batting practice, before everything. The pain part doesn't bother me, it's just [the possibility of] giving out on me and not working -- I don't want to be out there, especially in center field, in an important spot in the field."

Hamilton said there was no trigger moment that pushed him out of the game. He's already received one cortisone injection this season and said he's open to another but would leave that to the judgment of the team's medical staff. Because he's already received numerous cortisone shots in his career, he said he would not have to wait 24 hours after receiving the shot before playing.

"We'll know more tomorrow," manager Ron Washington said. "He came in on the one ball [a single by Alberto Callaspo in the fourth inning], and it sort of tweaked on him a little bit. We'll know more tomorrow."

Harden's return bumps Feldman to bullpen

ANAHEIM -- Rich Harden is returning to the Rangers' rotation and Scott Feldman is going to the bullpen.

Rangers manager Ron Washington said Harden, who is currently on the disabled list, will start on Saturday against the Angels. He replaces Feldman, who is 0-3 with a 6.17 ERA in his last six starts and will be used in middle relief. Doug Mathis is expected to go back to the Minor Leagues.

"Feldman has the experience in the bullpen," Washington said before Friday's game against the Angels. "Harden is ready to go. We had to make a decision. They both need to be on the club, so Harden will start and Feldman will be out of the bullpen."

Harden is 3-3 with a 5.68 ERA in 13 starts and has been on the disabled list since June 12 with a strained muscle in his lower back. He is 0-2 with a 5.19 ERA in four starts on rehab assignment but pitched six strong innings in his last outing for Triple-A Oklahoma City on Monday, allowing two unearned runs on two hits and a walk while striking out 10 against Memphis.

"We told him he had to go to Triple-A and dominate, and on Monday he showed he could dominate," Washington said. "He dominated."

Feldman, who was the Rangers' Opening Day starter, has made 79 relief appearances and 76 starts at the Major League level. But he hasn't worked out of the bullpen since April of last season. He began that season in the bullpen but then moved into the rotation and the end of April.

He remained there and ended up winning 17 games while being named Rangers Pitcher of the Year. But he is currently 5-9 with a 5.46 ERA in 20 starts this season.

"I'm just kind of surprised the way the season has gone from my results," Feldman said. "Obviously, we've got a good team and it's one of those things. I haven't been getting the job done and they have to go with another option. I have to go to the bullpen and get untracked.

"I just need to get back to myself and not tinker with stuff. I was successful last year sticking with my routine and trusting my stuff. That's the biggest thing."

Cantu, Moreland to split time for Rangers

ANAHEIM -- Jorge Cantu joined the Rangers on Friday, one day after being acquired from the Marlins, but was not in the lineup. Mitch Moreland was in the lineup at first base for the second straight night with right-hander Ervin Santana on the mound for the Angels.

Manager Ron Washington said Cantu, a right-handed hitter, will start on Saturday with right-hander Dan Haren pitching for the Angels. From there Washington said Moreland, a left-handed hitter, will start against right-handers and Cantu will get the lefties.

But it will not be a strict platoon. Washington said Cantu will face some right-handers.

"If we're in a position where we are facing a long run of right-handers, he will play," Washington said. "I'm not going to sit on him just because we're not facing any lefties."

Cantu is used to playing regularly after hitting .277 with 29 home runs and 95 RBIs in 155 games for the Marlins in 2008 and .289 with 16 home runs and 100 RBIs in 2009.

"I'll try to adjust," Cantu said. "That's what we all do, we adjust. When I'm out there I will make the best of it and contribute as much as possible to winning the division."

Cantu was hitting .262 with 10 home runs and 54 RBIs in 97 games for the Marlins while dealing with the trade rumors over the past few weeks.

"It's a weight off my shoulders," Cantu said. "It's more fun and really exciting to be a part of the Texas Rangers organization. They just want to win. They're winners. This team knows how to win. They are the team to beat in the American League. It's been very exciting to be a part of this."

Moreland hopes to seize chance in Texas

ANAHEIM -- The Rangers had reports from the Minor Leagues. Mitch Moreland was hot and he was the real deal. That's what their Minor League people were saying.

That's why he is here and why the Rangers optioned first baseman Chris Davis back to the Minor Leagues after Thursday's game. Davis was hitting .188 with no home runs and three RBIs in 31 games in two tours with the Rangers this year. He was 10-for-53 with no home runs and two RBIs since being recalled on July 9.

"He just wasn't producing at the plate," manager Ron Washington said. "He was working but he just wasn't getting the results."

Moreland was 2-for-4 in his debut on Thursday night after hitting .289 with 12 home runs and 65 RBIs in 95 games at Triple-A Oklahoma City. Now he has the opportunity to seize the Rangers' everyday first-base job.

"I don't know ... I haven't heard anything like that," Moreland said. "I came here, I've got the opportunity, now I have to make the most of it. It's been great so far. Words can't describe how I feel and how much fun I had yesterday. It still hasn't sunk in yet."

Kinsler expecting quick return from injury

ANAHEIM -- With Ian Kinsler on the disabled list with a strained left groin muscle, the Rangers acquired infielder Cristian Guzman from the Washington Nationals on Friday. That trade would suggest that Kinsler is going to be out for an extended period of time.

But Kinsler, who went on the disabled list on Thursday, said that's not necessarily the case.

"I think 15 days," Kinsler said. "I'm going to be optimistic. I think 15 days."

But Kinsler didn't see anything wrong with acquiring Guzman. When Kinsler comes back, Guzman will likely replace Joaquin Arias and Andres Blanco as the Rangers' utility infielder.

"If I need an extra day or two or a few days I think it makes it a little easier," Kinsler said. "But at the same time, Blanco and Arias are doing a great job. But [Guzman] obviously has a lot more experience, been in the league a lot longer and has done a lot more things. So that aspect, just the experience factor I think is good."

Kinsler said he has been dealing with the strained groin muscle for an extended period of time and Dr. Keith Meister was becoming concerned about it. Kinsler had an MRI earlier this week and was examined by Meister.

"He didn't like the MRI, so basically we just said it's not something we want to mess with," Kinsler said. "It was gradually something that was just getting worse. No one knows how long I would've lasted before i pull it or even if I do pull it. I might've been able to make it through the season without pulling it. But right now it's not worth it."

Worth noting

Rangers manager Ron Washington said catcher Taylor Teagarden's next start will be on Sunday with Cliff Lee on the mound. ...Washington started David Murphy in place of Julio Borbon on Friday night. Washington said Borbon will start on Saturday and Sunday. ... C.J. Wilson is the only Rangers pitcher with 10 wins in a season as a starter and 25 saves in another season as a reliever. ... Michael Young's four-hit night on Thursday was his 19th with the Rangers. That's third most in club history. Ivan Rodriguez had 23 and Rafael Palmeiro had 21.