Atlanta recalled Keirsey from Triple-A Gwinnett on Friday.
Atlanta placed Thomas on the 10-day injured list Friday with a left intercostal strain.
Perez took a no-decision Thursday against Tampa Bay, allowing four hits and two walks in seven scoreless innings. He struck out four.
Iglesias earned the save Thursday against the Rays, allowing one run on one hit and one walk in the ninth inning. He struck out one.
Atlanta manager Walt Weiss said Thursday that Thomas (side) will be placed on the 10-day injured list, Mark Bowman of MLB.com reports.
Bender (lower leg) has ceased baseball activities and will get another opinion on the lingering soreness in his shin, MLB.com reports.
Pauley went 3-for-6 with a run scored and two RBI in Wednesday's loss to the Mets.
Thomas was scratched from the lineup for Thursday's game versus the Rays due to left side tightness, Mark Bowman of MLB.com reports.
Conine went 3-for-6 with a double, two runs scored and two RBI in Wednesday's loss to the Mets.
Yastrzemski is absent from the lineup for Thursday's tilt against the Rays.
