SAN DIEGO -- Manager Don Mattingly sat Juan Rivera and Juan Uribe Saturday night, explaining that it was partly for rest, partly for matchups.

With San Diego starting right-hander Dustin Moseley Saturday and left-hander Clayton Richard on Sunday, Mattingly said he started left-handed hitting Tony Gwynn in left field to give Rivera a day off while planning to start Rivera Sunday against Richard.

"I noticed last year, I kept banging [Rivera] and it wore him down a little bit," said Mattingly.

Left-handed-hitting Adam Kennedy started at third base for Uribe, who is 1-for-7 lifetime against Moseley.

"[Uribe]'s going to be streaky," said Mattingly. "I won't let two games [0-for-7 with a walk and two strikeouts] determine how I feel about this guy. He's going to get his at-bats, he'll get his chance. I really don't have anyone who can play there every day. He's our best defensive guy there."

Mattingly said the roster moves over the winter -- most notably the signings of Kennedy and Jerry Hairston Jr. -- will allow him to mix and match based on the opposing pitchers and the schedule, which he noted has the Dodgers playing 30 day games after night games.

"I like fresh guys over the course of the season," he said. "We have a bunch of day games after night games. Fresh teams occasionally win those games. Guys get tired."

Kershaw feeling better after bout with flu

SAN DIEGO -- A healthier Clayton Kershaw threw his regular between-starts bullpen session Saturday, and said he felt good and that he expected to make his scheduled start in Tuesday's home opener.

Pitching coach Rick Honeycutt said Kershaw threw a few more than his normal 35 pitches, which pretty much equaled his workload in Thursday's Opening Day start that was aborted after three innings when he was stricken with the stomach flu.

Kershaw felt well enough Saturday to follow the bullpen session with conditioning sprints in the outfield.

"I saw him in the food room. He was talking, actually smiling," said manager Don Mattingly.

Mattingly knew Kershaw was done Thursday night when he saw him laying on the floor in the tunnel between the dugout and clubhouse.

"Today he was actually standing," he said.

Honeycutt said he was comfortable that Kershaw will be strong enough by Tuesday, as did Kershaw.

"I knew I wasn't going to hurt myself," said Kershaw, whose first fastball was clocked at 85 mph and who purposely didn't follow through for fear that he would throw up if he bent over. He did hit 92 mph striking out Chase Headley with the bases loaded to end the third inning on what proved to be his final pitch.

"That's probably what did me in," he said.

Coaches hopeful to have found Jansen's flaw

SAN DIEGO -- The Dodgers are hopeful that they've spotted a mechanical flaw in reliever Kenley Jansen that has led to the four home runs he has allowed in the last 10 innings.

Bullpen coach Ken Howell said pitching coach Rick Honeycutt determined through video comparison with last year that Jansen has been pushing off with a stiff right leg and not utilizing the lower half of his body, resulting in decreased velocity and movement.

And resulting in home runs. He served up a 445-footer to Cameron Maybin on Opening Day, after allowing three in only nine Spring Training innings. In the regular season last year, Jansen allowed only three home runs in 53 2/3 innings.

Dodgers release right-hander Monasterios

SAN DIEGO -- The Dodgers have released right-hander Carlos Monasterios, who pitched in 32 games for them in 2010 but has since required two elbow operations.

Monasterios, 26, was a Rule 5 Draft pick who went 3-5 with a 4.38 ERA in 2010, when he started 13 games and spent the entire season in the Major Leagues. But after making one start at Triple-A last year, he required Tommy John elbow reconstruction and missed the rest of the season.

He encountered further arm problems after reporting to Spring Training this year and at the end of March underwent surgery to relocate the ulna nerve.