Ramirez was forced into duty as a reliever in the 15th and final inning of the Rays' epic win over the Twins on Sunday, but still got the green light to start the series opener against the Rangers.
Perez is 1-0 with a 3.20 ERA over his past three starts and 2-3 with a 3.47 ERA in six starts at home. He has a record of 0-2 with a 5.33 ERA in four career starts and one relief appearance against the Rays.
Texas returns home on Monday to open a series against Rays, with Martin Perez and Erasmo Ramirez facing off on the mound.