Cubs interim manager Mike Quade has decided to leave rookie Tyler Colvin in the outfield and doesn't expect to to utilize the left-hander at first during the club's current series, barring injuries.

Injured Cubs right-hander Carlos Silva, on the 15-day disabled list since Aug. 2 for cardiac evaluation, will throw a side session Tuesday at Nationals Park.

The Cubs activated Geovany Soto from the 15-day disabled list before Monday's game against the Nationals and inserted the catcher, who had been sidelined with a sprained ligament in his right shoulder, into the starting lineup.

Cubs bench coach Alan Trammell on Monday deflected any disappointment at being passed over for the managerial job that went to third-base coach Mike Quade.

The Cubs completed their revamped Major League coaching staff on Monday, with the announcement that former outfielder Bob Dernier will take over as first-base coach.

Lou Piniella, who turns 67 on Aug. 28, announced he is retiring immediately after Sunday's Cubs game to go home and take care of his ill mother, giving his players an early goodbye after planning to wait until the end of the season.

Lou Piniella fully intended to finish the year with the Cubs, but his mother's health prompted him to retire early. Sunday's 16-5 loss to the Braves was Piniella's last as manager.

Lou Piniella ended his managerial career Sunday with a 16-5 Cubs loss to the Braves. The Cubs skipper announced July 20 that he was retiring at season's end, but he moved up the date so he can go home to Tampa, Fla. His 90-year-old mother is ill.

Cubs pitcher Carlos Silva, sidelined because of an abnormal heart rate, threw 30 pitches over two innings in a simulated game Sunday at Wrigley Field.

On Monday, Mike Quade will take over as the Cubs' interim manager, replacing Lou Piniella, who is retiring after Sunday's finale against the Braves.

Recognizing that this would be Bobby Cox's final trip to their home park, the Cubs had planned to have Lou Piniella and Cox exchange the lineup cards before this series finale. This exchange proved more significant once Piniella revealed that he was ready to put an end to his managerial career Sunday.

Aramis Ramirez and Tyler Colvin drove in two runs apiece, backing seven strong innings from Tom Gorzelanny as the Cubs beat Atlanta, 5-4, before 41,099 at Wrigley Field on Saturday.

Starlin Castro has averaged 4.5 plate appearances per game since he became the Cubs' primary No. 2 hitter in the lineup. If he doesn't get any more days off, Castro should qualify for the National League batting title by the end of August.

Carlos Silva is scheduled to throw a simulated game Sunday, the next step in his recovery from surgery for an irregular heartbeat.

Tyler Colvin got a break from his speed course on infield play Saturday, when Cubs manager Lou Piniella inserted him in the starting lineup in left field. Alfonso Soriano had the day off.

Unless the Cubs go on an unprecedented late-season tear, Sunday will likely mark the final matchup between long-time managers Lou Piniella of the Cubs and Bobby Cox of the Braves.

Less than 48 hours after being traded to Atlanta, Lee returned to Wrigley Field to make his Braves debut against the same Cubs teammates who had told him good-bye on Wednesday.

Carlos Marmol walked three in the ninth inning to load the bases with two outs, then Rick Ankiel cleared them with a triple to give Atlanta the 5-3 win.

This is manager Lou Piniella's last season. Is it a disappointing one? "What are you going to do?" Piniella said on Friday. "You take the good with the bad. It hasn't been easy for me, but it's not easy for anybody, and this isn't about me. This is about this organization."