Nimmo went 1-for-4 with a three-run home run in Sunday's 10-5 loss to the Orioles.
Rocker (4-9) took the loss Sunday against the Orioles, allowing six runs on seven hits and two walks while striking out five over three innings.
Vargas went 1-for-3 with a double, a run scored and two walks Sunday against the Guardians.
Doyle went 2-for-5 with a double, a run scored and a stolen base Sunday against the Guardians.
Montgomery went 1-for-3 with a three-run home run Sunday against the Guardians.
Gonzales re-signed Friday with the Rangers on a minor-league contract.
Richards secured the save against the Guardians on Sunday, allowing one run on no hits and two walks in the ninth inning.
Martin took a no-decision against the Guardians on Sunday, allowing two runs (one earned) on two hits and one walk in one inning. He struck out one.
Jansen (forearm) will begin a minor-league rehab assignment with Double-A Frisco on Tuesday, Jeff Wilson of AllDLLS.com reports.
Lopez is out of the lineup for Sunday's game against the Orioles.
