After making his first major league start, Andrew Carpenter was optioned back to Triple-A Lehigh Valley.

Sergio Escalona, a left-hander from Double-A Reading, will take over the vacant spot on the roster on Sunday. Phils manager Charlie Manuel said he expects the team to keep the extra pitcher for the duration of the three-city road trip.

Carpenter originally replaced reserve infielder Miguel Cairo.

Escalona, 24, was 0-0 with 10 saves and a 2.08 ERA in 14 games at Reading this year. He has 16 strikeouts in 17 1/3 innings.