Mahle (elbow) struck out four over 4.2 innings and gave up two earned runs on three hits and one walk in his rehab start Wednesday with Triple-A Round Rock.
Making what could be his final rehab start before being activated from the 60-day injured list, Mahle tossed 74 pitches (48 strikes) and sported a four-seam fastball that sat around 92-93 mph for most of the night before dipping into the upper 80s in the fourth and fifth innings. Though Mahle's most recent two rehab starts weren't as sharp as his first four, he's likely done enough to prove that he's healthy again coming off Tommy John surgery and ready to join the big-league rotation. Mahle, who signed a two-year, $22 million contract this winter, could make his Rangers debut as soon as Monday versus the Astros in Arlington.