CHICAGO — Reds manager Dusty Baker had another test Thursday and will remain hospitalized at least one more day so doctors can monitor his progress after he was diagnosed with an irregular heartbeat.
If all goes well, Baker, 63, could return to Cincinnati today, the team said.
GM Walt Jocketty visited Baker on Thursday morning and said Baker felt good.
Bench coach Chris Speier served as acting manager for a second straight game, a victory over the Cubs.
"I worry about Dusty, and everybody in that clubhouse was really worried," Speier said. "You don't just go to the hospital for a cold or anything like that. … My thoughts are more about Dusty than this game."
Baker left Wrigley Field in street clothes before Wednesday night's game, and it was initially announced he would have chest X-rays to rule out pneumonia.
"Chris Speier did an excellent job, but I think (Baker is) missed, and we're looking forward to having him back, and more importantly, we're hoping for the best with his health," 1B Joey Votto said.
bochy supports 49ers qb: Giants manager Bruce Bochy, saying "I'm a big 49er fan," showed support for quarterback Alex Smith by wearing a red Niners cap in the dugout against the Rockies, a day after Smith said the NFL fined him $15,000 last season for sporting a Giants hat after games. That fine was later dropped. When told about Bochy's hat, Smith smiled and said: "Oh, yeah, sweet.''
Teixeira to rehab in tampa: Yankees 1B Mark Teixeira plans on traveling to Tampa on Monday to rehabilitate his strained left calf during instructional league games at New York's minor-league complex. He has played once since Aug. 27, reinjuring the calf Sept. 8. "Just by feeling it right now, you can tell that it's swollen and tight and sore," said Teixeira, who has not resumed on-field workouts but planned to take indoor batting practice Thursday.
carpenter pitches today: Cardinals RHP Chris Carpenter was scheduled to make his 2012 debut against the Cubs today, the first of potentially three regular-season starts that could boost St. Louis' pursuit of the second NL wild card spot. Carpenter, 37, had surgery in late July for a nerve ailment that caused numbness up and down his right side.
fun with rookies: The Diamondbacks and Padres hazed their rookies after Thursday's game. Arizona rookies wore women's clothing for their flight. San Diego rookies were in Olympic attire: boxing trunks, cycling shorts and tops, and swim trunks.
Athletics: LHP Brett Anderson is out for the season after straining his right oblique while falling awkwardly from the mound Wednesday.
cubs: Jason Berken became the fifth in club history to strike out four in one inning when the Reds' Ryan Hanigan reached on a third strike wild pitch in the second.
orioles: Baltimore's 3-1 11-inning victory over the Mariners on Wednesday was its 15th straight extra-inning win. The team says its extra-inning streak is the longest since the Indians' 17 straight in 1949.