CHICAGO -- Tony Gwynn Jr. was so key to the Brewers' opening win over the Cubs on Monday that media relations director Mike Vassallo named Gwynn the team's player of the month for March.

Seriously, though, manager Ned Yost said he was not tempted to leave Gwynn in the lineup for the first game of April.

While center fielder Mike Cameron serves a 25-game suspension to start the season, Yost plans to primarily use left-handed-hitting Gwynn at that position when the Brewers face right-handed starting pitchers. When they face left-handers, center-field duties most often will fall to righty-hitting Gabe Kapler.

Sure enough, with left-hander Ted Lilly on the mound for Chicago, Kapler was in the lineup, batting second, for the second game of the series on Wednesday.

"My plan is my plan," Yost said.

Kapler, who managed in Boston's Minor League chain last season before the Brewers lured him back, batted .250 in Spring Training while playing solid center-field defense. For his career, Kapler is a .288 hitter against left-handers and a .263 hitter against right-handers.

Gwynn, by the way, has solid numbers against lefties, though it is a very small sample. Over 200 Major League at-bats in 2006 and '07, he batted .280 against lefties and .257 against righties.