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09/17/10 11:58 PM ET

Tulo putting Rox on his back with power stroke

To say Troy Tulowitzki has taken the Rockies on his back in September would be an understatement. The shortstop has 12 home runs in his past 14 games, including a two-run homer in the first inning of Friday's 7-5 victory over the Dodgers.

With the win on Friday, the Rockies pulled within 1 1/2 games of the front-running Giants in the National League West. Jhoulys Chacin takes the mound on Saturday to try to pull even closer to the Giants, whom the Rockies square off against next weekend at Coors Field.

In his previous start on Sunday, Chacin looked way out of whack. He lacked control of his pitches and exited after only four innings. He allowed two runs in the outing, both of which were unearned due to a throwing error he committed in the third inning that could have resulted in a double play.

"I didn't have my command," Chacin said. "I was just battling all game. I wanted to put the team in a position to win."

Chacin is 2-2 with a 3.65 ERA in four starts against the Dodgers this season, but he is 3-6 with a 2.80 ERA in eight road starts -- a testament to the Rockies' struggles away from Coors Field. Colorado owns a 51-24 home record, compared to 30-42 on the road.

John Ely takes the bump for the Dodgers -- his second start since being called up in early September from Triple-A Albuquerque. Dodgers manager Joe Torre said Ely will remain in the rotation for the rest of the season.

In his past outing on Sept. 11, Ely allowed six hits and three earned runs in six innings, with four strikeouts and a walk. The 24-year-old rookie is 4-7 with a 4.62 ERA in 15 starts for the Dodgers this season.

"He was violent at times, but smoothed it out," Torre said.

With a fastball that tops out in the upper 80s, it will be crucial for Ely to keep the ball down if the Dodgers are going to even up the series Saturday afternoon.

Dodgers: Mattingly to replace Torre
Torre will step aside at the end of this season to allow Don Mattingly to take the reins of the Dodgers.

Torre is in the final year of a three-year contract, while Mattingly has been the Dodgers' hitting coach since the 2008 All-Star break.

"It has been an incredible honor to wear the Dodger uniform, and I will always carry with me some very special memories from the past three seasons," Torre said in a release. "This was not a decision I took lightly, but I believe it's the right one for myself and my family, and I'm truly thrilled that Donnie will be the one leading the Dodgers. It's time that the Dodgers had a new voice, and I have the utmost confidence in him. I know he's ready for the challenge."

Mattingly was a six-time All-Star and the American League Most Valuable Player in 1985 as a first baseman for the Yankees. He's never managed at any level, but when he joined the Dodgers with Torre three years ago, it was no secret that Mattingly would be the heir to the position when Torre stepped aside.

Rockies: Stewart eyes return against Giants
Third baseman Ian Stewart could be back on the Rockies' active roster if no setbacks occur when the club returns home in a week against the Giants. Stewart participated in baseball activities on Friday.

Stewart has been out of the lineup since Aug. 30 with a strained right oblique. He's batting .264 with 18 home runs and 60 RBIs this season. His expected return would come at a great time for Rockies, as they square off against their divisional foe.

"If everything goes the way we would like to see it go, after Sunday's game, we will send him to Tucson to be involved in the Instructional League, so by the time we come back from the road trip, he could be active," said manager Jim Tracy.

Worth noting
Chris Iannetta took dry swings and did some light running Friday, and Tracy is expecting the catcher to be back in the lineup early next week. He's been day-to-day since he strained his right calf in Sunday's game. ... With his win on Friday, Ubaldo Jimenez tied Roy Halladay and CC Sabathia for the Major League lead with 19 victories. ... Dodgers catcher Russell Martin was evaluated Friday and said he was optimistic that he would not be on crutches any longer. Martin hit .248 with five homers and 26 RBIs in 97 games this season before fracturing his right hip.

This story was not subject to the approval of Major League Baseball or its clubs.