Brown, 27, has struggled this season, hitting .234 with a .631 OPS and just eight home runs through Sept. 4. His poor performance comes after a career year in 2013, when he had an OPS of .818, hit 27 home runs and made his only career All-Star Game.
The Phillies have an excess of outfielders, including Brown, Ben Revere, Marlon Byrd, Darin Ruf and recent acqusition Grady Sizemore. According to Gelb, the team will look to move Brown in exchange for a similar "change-of-scenery-type player" to help settle the outfield.
In five seasons, the former top prospect has combined to hit .249 with a .723 OPS. He is under Philadelphia's control through the 2017 season and is eligible for arbitration in 2015.
The Phillies entered Friday in last place in the National League East at 64-75 and will likely miss the playoffs for the third consecutive season. The team elected not to trade any of its veterans at this year's deadline, and Phillies interim president Pat Gillick said this week that both general manager Ruben Amaro Jr. and manager Ryne Sandberg will return next season.
- Ben Estes