LaRoche went 4-for-5 with a homer and two RBI against the Cubs

Adam LaRoche is not in the Nationals' starting lineup on Monday

Adam LaRoche is not in the Nationals' starting lineup on Monday night versus the Phillies.

Impacts: Philly is throwing left-hander John Lannan so Chris Marrero will play first base. LaRoche has a .739 OPS, 10 home runs and 30 RBI through 65 games this season.

LaRoche is not in the lineup for Monday's game against the

LaRoche is not in the lineup for Monday's game against the Phillies.

Spin: Laroche is mired in an 0-for-15 slump, and owns just a .678 OPS against left-handers this season, so he will get a day off with southpaw John Lannan getting the start for the Phillies. Chris Marrero will get the start at first base in LaRoche's place.

Adam LaRoche on the bench

Nationals first baseman Adam LaRoche is not in the team's starting lineup Monday against the Phillies.

LaRoche will get a day off against lefty John Lannan. LaRoche is hitting .237/.319/.420 in 224 at-bats this year. He'll be replaced by Chris Marrero, who will bat sixth.