He also won the award for April 4-10. Teammate Ryan Braun (April 18-24) won it earlier this season, and he also was the NL Player of the Month for April. If Fielder keeps up his current pace, Fielder would be a candidate for June, though his focus was elsewhere.
"I'm just glad the team is playing good baseball and we're winning," Fielder said on Monday. "That makes it that much better. ... Usually, when you have a lot of guys being successful [individually], it means you're winning."
He homered and scored two runs in Milwaukee's 5-3 win against St. Louis on Saturday, and went 2-for-3 with a go-ahead, 440-foot home run in the series finale on Sunday to help the Brewers sweep the Cardinals and move into first place in the NL Central.
The two-time All-Star's 58 RBIs entering Monday ranked first among NL hitters, while his 19 home runs ranked second.
It is the 27-year-old's fourth weekly honor of his career. Braun (.333 average, home run, six RBIs, seven runs) also was considered this week. Brewers right-hander Zack Greinke (2-0 record, 3.21 ERA, 15 strikeouts, 14 innings pitched) was in the running for the NL Pitcher of the Week Award, an honor Shaun Marcum captured May 16-22.
"They are individual awards, but it does tell you what's going on with your team," Brewers manager Ron Roenicke said. "If you have a lot of guys doing it, you know there's always something positive going on in your games."
The Brewers, winners of eight of their last 10 games, were back in action on Monday against the Cubs.
Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.