Making the first of several moves related to the Sept. 1 roster expansion, the Rays have called up OF Fernando Perez from Triple-A and optioned reliever Juan Salas to Double-A. Executive VP Andrew Friedman said they also plan to call up C John Jaso before Tuesday's game, choosing him to serve as the third catcher over veteran Mike DiFelice, who was granted his release.

Since Perez, who has never played in the majors, was recalled before tonight's midnight deadline, he would be eligible for the postseason roster, adding speed and defense.

The Rays also recalled injured RHP Jae-Kuk Ryu and placed him on the major-league DL, which allows them additional flexibility to add another player to the roster, just as they have the option to replace pitcher Chad Orvella.

Friedman said the moves were made so "if we're fortunate enough to make the playoffs to expand our applicant pool.''

Friedman said additional callups likely won't be made until after Durham is done in the playoffs; the Bulls open best-of-five play Wednesday.