LOS ANGELES -- Dodgers catcher Rod Barajas left Saturday night's 7-0 loss to the Astros with what manager Don Mattingly said was a "significant" right ankle sprain and is expected to be placed on the 15-day disabled list Sunday.

Barajas' injury would be the 19th disabling injury the Dodgers have suffered this year.

The injury occurred while Barajas was chasing a Mike MacDougal wild pitch in the fifth inning. Shortly afterward, Triple-A Albuquerque catcher A.J. Ellis was lifted for a pinch-hitter in the Isotopes' game with Iowa, and he is expected to be called up. He is hitting .307.

Barajas went for X-rays during the game.

He turned his ankle as he went into a slide while approaching the pitch that bounced about 20 feet away from the plate near the visitors' on-deck circle while Jason Bourgeois scored from third base.

Barajas was briefly unable to move and had to flip the ball back to MacDougal, then fell over backward.

He was attended to by team trainer Stan Conte and almost immediately limped into the dugout. He was replaced by Dioner Navarro.

Jansen activated from DL; Lindblom optioned

LOS ANGELES -- The Dodgers activated right-handed reliever Kenley Jansen off the 15-day disabled list Saturday and made room by optioning right-handed reliever Josh Lindblom to Double-A Chattanooga.

Jansen had been on the DL since May 29 with right shoulder inflammation and was on a rehab assignment with Chattanooga. He has a 6.43 ERA in 20 appearances with the Dodgers, although 12 of the 15 runs he's allowed came in three games and he was scoreless in the other 17.

Jansen said his shoulder is healthy and that, while at Chattanooga, he worked on secondary pitches, including a new splitter. With the urging from management, he also lost 10 pounds by paying attention to his calorie intake. He also said he's "learned his lesson" from trying to pitch through pain.

"This [pitching] is a new position for me," said Jansen, a converted catcher. "I tried to go out and compete, even with pain. I realize now it cost me almost three weeks. When you're catching, your body is sore and you just go through it."

Lindblom, who was called up to replace Jansen, pitched well in his first Major League stint, compiling a 1.69 ERA in eight appearances.

"They told me it was pretty much a numbers game," said Lindblom, who revived his career after a dreadful 2010 season. "What I did, from where I came last year, they were proud of that as far as the advancement. Now that I've been here, I know I can get big league hitters out."

Lindblom said his successful stay boosted his confidence and he won't fall victim -- as others have -- to being bitter after getting demoted despite pitching well.

"It's not my way to go back and mope," he said. "This has been my dream my whole life. I'm sure I'll just be more hungry to get back and not take anything for granted. Anybody can be sent back anytime."

Manager Don Mattingly said Lindblom needs to work on varying his pitch sequences against left-handed hitters (.455 batting average against him) compared to against right-handed hitters (.125).

Mattingly also said he expected to activate Hong-Chih Kuo from the disabled list on Sunday, leaving two relievers (Vicente Padilla and Jonathan Broxton) on the disabled list.

Padilla is out for the year with neck surgery. Broxton is expected to start a Minor League rehab assignment Monday for Triple-A Albuquerque and could rejoin the Dodgers the following week.

Mattingly wants Gordon to keep working hard

LOS ANGELES -- Dodgers manager Don Mattingly gave the starting shortstop and leadoff jobs to rookie Dee Gordon with the latest injury to Rafael Furcal, but Mattingly is not ready to predict the second coming of Ozzie Smith just yet.

"It won't be long before teams make adjustments and try something different, and we'll see if he continues to work, see if he continues to want to learn," Mattingly said of Gordon, who came into Saturday night's game batting .308 with eight runs scored in 10 games.

"I just want him to play every day without putting a tag on him," Mattingly added. "You know it's there. You just don't want to anoint him after two weeks. He has to work and get better. I don't want him to get to where he backs off. As [the media] builds him up, I've got to bring him down a little bit."

Mattingly said he wasn't implying that he doubted Gordon's commitment to continue his progress. Gordon has provided an offensive spark with his speed, but his on-base percentage is only .325 (Jamey Carroll's is .389) with seven strikeouts and one walk.

Defensively, Gordon has made some spectacular plays, although he also was late covering second base Friday night on a play that turned into two runs for Houston.

"From where I was, the runner would have been safe anyway," Mattingly said of the sixth-inning smash by Jason Bourgeois that Aaron Miles stopped with a dive, before his throw to second base got past Gordon in a five-run inning.