"He had a bruised hand in Pittsburgh this year and played right through it even though it was swollen pretty good," Macha said.
Fielder, who has the longest active streak in the Major Leagues, played in his 275th consecutive game on Thursday night against the Braves, moving past Hall of Famer Robin Yount as the Brewers' record holder.
"If I'm here, I might as well play," Fielder said. "That's the way I've always been. I don't like to sit out. I can't really remember the last game I didn't play in."
Fielder has been out of the lineup just 12 times in his five years as a regular with the Brewers. He sat out five games in 2006, four in 2007 and three in 2008.
"I don't think about injuries," Fielder said. "I believe in keeping it out of your mind. Then they have a better chance of not happening. You're going to be sore at times. That's baseball. You just have to play through it."
Fielder, who went into the All-Star break hitting .265 with 20 homers and 39 RBIs, has started at first base for all of the Brewers' 90 games this season except one. He was the designated hitter in an Interleague game.