PHILADELPHIA - The Phillies activated All-Star left fielder Domonic Brown from the disabled list on Tuesday. Brown has not played since July 23 because of concussion symptoms.

To make room for Brown on the roster, the Phillies designated outfielder Laynce Nix for assignment.

The 25-year-old played in a rehabilitation game Monday with Single-A Lakewood and went 3-for-5 with a home run.

Brown still leads Philadelphia in several offensive categories, including home runs (24), RBIs (69), runs (51) and slugging percentage (.531) despite an 11-game absence. The Phillies went 1-10 during Brown's stint on the DL.

Nix was a disappointment for the Phillies this season, hitting only .180 with four doubles, two home runs and seven RBIs in 136 plate appearances.

Brown was in the starting lineup in left field for Tuesday's game against the Chicago Cubs. Darin Ruf started in right, despite the fact that Brown has played 437 games in right, while Ruf has never played in that spot.

"Dom Brown's improved a lot in the outfield," Phillies mananger Charlie Manuel said in a story on the team's website. "And he's been playing left field and his improvement has actually come in left field. I think that his season speaks for itself.

"Right now, we want to definitely find out what are options are for right. I like keeping (Brown in left), basically when you get down to it. I want to make sure Ruf gets some playing time and we look at him and he gets enough at-bats for us to see exactly what he can do."

Ruf took some fly balls before and during batting practice.

"Hopefully, it'll be a smooth transition, but I've never played there before," Ruf said in a story on the team's website. "I played one winter ball game out there this year. Other than that, it's a new position. But other than that, hopefully, I'll be able to learn on the fly."