Buehler (elbow) allowed two runs on four hits and four walks while striking out three across 2.2 innings in a rehab outing with Triple-A Oklahoma City on Thursday, Eric Stephen of SBNation.com reports.
O'Neill (concussion) will travel with the Red Sox to Pittsburgh this weekend and hopes to be activated when first eligible Tuesday, Ian Browne of MLB.com reports.
Manager Alex Cora said Thursday that Devers is out of the lineup for the Red Sox's series finale versus the Guardians while he receives an MRI on his left knee, Christopher Smith of The Springfield Republican reports.
Rangers manager Bruce Bochy said Wednesday that Lowe will need "about 30 [at-bats], could be more" during his minor-league rehab assignment before returning from the 10-day injured list, Shawn McFarland of The Dallas Morning News reports.