MIAMI -- Some fine-tuning with his swing has produced some big results for Marlins third baseman Hanley Ramirez.

After consulting with hitting coach Eduardo Perez, Ramirez has tweaked his stance. Basically, he's lowered his hands and stopped raising his front leg so high.

The results have been tremendous in the first three games since making the adjustments.

Ramirez is 9-for-16 with three homers and nine RBIs in Miami's last four games, including homers in three straight contests.

"He's committed," Perez said. "I think he realizes that right now, where his stance is and where his hands are, it's good for him. What's good for him right now is good for the ballclub."

Ramirez provided the game-winning hits on Sunday against the Astros and Tuesday against the Cubs.

"We know all the potential that he has," Perez said. "Right now, he's just going out there and he's staying more compact. His leg kick is not as high, his hands are lower. It's working."

A year ago, Ramirez was plagued by injuries, which were major factors in his dip in production.

Now, he's locked in, and he's providing a big boost in the middle of the order.

"He has unbelievable ability," Perez said. "I just want him to be consistent. Consistency is what you see from all the best hitters in the league, and that's what we're seeing right now."

Infante sidelined by left groin strain

MIAMI -- The mild left groin strain that sidelined Omar Infante last Saturday acted up on the Marlins second baseman on Tuesday.

As a precaution, Infante was held out of the starting lineup in Wednesday's 9-1 victory over the Cubs and will not start Thursday in the series finale.

The Marlins are hopeful the veteran second baseman returns as early as Friday at Washington.

"He feels a little tight. He hurt it a little bit yesterday," manager Ozzie Guillen said. "It wasn't good enough for him to go out and play."

Infante said he aggravated his groin on his double Tuesday night. He remained in the game, but didn't feel right on Wednesday.

Donnie Murphy is filling in at second base until Infante is ready to start. Murphy went 2-for-3 with a home run and three RBIs on Wednesday.

Infante initially tweaked his groin last Friday against the Astros. He stayed in the game, but he was given Saturday off.

On Wednesday, the second baseman took the day off from taking batting practice or fielding.

"In a couple of days, I should be good," Infante said.

Infante has been one of the Marlins' hottest hitters, batting .333 with four doubles, four home runs and six RBIs.

"It's a little bit precautionary to make sure that he's fine for the next series," Guillen said.

Bonifacio showcasing game-changing speed

MIAMI -- As advertised, the Marlins will run when given a chance.

Emilio Bonifacio is certainly showcasing his game-changing speed.

The Miami center fielder entered Wednesday with seven stolen bases, which is tied for the National League lead.

Bonifacio is off to a terrific start, batting second behind Jose Reyes and in front of Hanley Ramirez.

A switch-hitter, Bonifacio is hitting .348, and he's scored nine runs.

"Boni is doing everything we're asking him to do, besides hitting .300-something," manager Ozzie Guillen said. "He's getting on base. Like I've said earlier, we've got the speed, and we're going to use it. This kid has been very good since Spring Training. Last year, he had a great year. This year, it's a carryover. He's a big part in the games we're winning, and the rallies we've had."

The Marlins set up their lineup to offer game-changing speed at the top of their order. Reyes upped his average to .240 with two hits in Wednesday's 9-1 win.

"When one of those two guys get on base, they make something happen," Guillen said. "When both guys get on base, it makes it more exciting.

"Right now, Reyes, he will get out of the slump. I think he is trying to do too much, that's my opinion. When those two guys, get hot, we'll score a lot of runs. Right now, they're off and on."