Sweeney is hitting .231/.293/.358 with five home runs and nine stolen bases in 268 at-bats for Triple-A Lehigh Valley.
Sweeney was acquired from the Dodgers last season as part of the trade that sent Chase Utley to Los Angeles. His struggles this season could put his 40-man roster spot in jeopardy this offseason. The Phillies could trade Andres Blanco this month which would open up a roster spot for a utility player, but Taylor Featherston might be the choice to replace Blanco if the veteran gets dealt.