Gray (abdomen) pitched four innings in a rehab start with High-A Modesto on Sunday, giving up two runs on four hits, Nick Groke of the Denver Post reports.
Gray pitched decently in his rehab appearance, but more importantly, he came out of the outing healthy. He's expected to make one more rehab appearance, but then he'll rejoin the Rockies rotation in place of Christian Bergman, who's scheduled to make a spot start for him Thursday.