Left fielder Matt Holliday was removed in the eighth inning from the St. Louis Cardinals' 6-5 loss to Miami.
Cardinals manager Mike Matheny said Holliday was suffering from a bruised knee. Cardinals trainer Greg Hauck informed a club spokesman that it was Holliday's left knee that was injured.
Holliday, who was not available for comment, could have injured the knee in the first inning when he was hit by a low pitch from Marlins rookie left-hander Andrew Heaney.
"He's got some bruising on his knee," Matheny said. "I'm not exactly sure how it happened, but something came up and we had to get him out."
The Cardinals hope Holliday is available for the series finale at 1:15 p.m. Sunday, when rookie left-hander Marco Gonzales (0-1, 9.64 ERA) will make his Busch Stadium debut.
"I don't think it's going to be a while," Matheny said of the amount of time Holliday could be sidelined. "We're still waiting for the details. It's a pain thing, so it affects everything, I would imagine, or he wouldn't have wanted to come out of the game."
Holliday has been hit by a pitch nine times this season. His career-high is 15 hit by pitches in 2006.
Catcher Yadier Molina extended his hitting streak to six games Saturday with a 2-for-5 performance.
Molina, likely the National League starter in the All-Star Game on July 15, is batting .294 with seven homers and 30 RBIs. During the streak, he is hitting .476 (10-for-21).
Peter Bourjos, who started in center field, ended an 0-for-9 skid with a first-inning single --his only hit of the game.
The only position player without a hit Saturday was Matt Carpenter, who was 0-for-4 with a walk.
Return of Wong
Second baseman Kolten Wong is expected to be activated Sunday. Wong has been on the disabled list with a bruised left shoulder.
Wong's return likely will add another chapter to outfielder Shane Robinson's now-you-see-me, now-you-don't season.
Robinson has had three separate stints with the Cardinals this season, but is most likely the odd man out and will be sent to Class AAA Memphis.
The Cardinals' top two draft picks, right-handers Luke Weaver (27th overall) and Jack Flaherty (34th), made their professional debuts Saturday for the Gulf Coast League Cardinals.
Weaver, who played at Florida State, worked one inning and surrendered a two-run homer. Flaherty, from Harvard-Westlake High in Studio City, Calif., pitched a scoreless inning.
The All-Star Game roster will be announced at 6 p.m. Sunday. The Cardinals figure to have Molina and pitcher Adam Wainwright on the NL team.
Reliever Pat Neshek (2-0, 0.77 ERA), who threw scoreless innings Friday and Saturday, is eagerly awaiting to see whether he will be on the team. It would be his first All-Star Game.