The Rangers activated Montgomery (elbow) from the 60-day injured list Friday.
The Rangers designated Kingham for assignment Friday.
The Yankees signed Garver to a minor-league contract Friday, Ted Schwerzler of minnesotasportsfan.com reports.
Foscue went 1-for-2 with a triple, two RBI and a run scored in Wednesday's 6-0 win over San Francisco.
Nimmo went 2-for-3 with a walk, a home run, two RBI and an additional run scored in Wednesday's 6-0 win over the Giants.
Warren (8-5) took the loss against St. Louis on Wednesday, allowing three runs on seven hits and one walk while striking out five across 5.1 innings.
Bradford didn't factor into the decision in Wednesday's 6-0 win over the Giants, allowing five hits and two walks over 4.1 scoreless innings. He struck out five.
Caballero is out of the lineup for Wednesday's game against the Cardinals.
Manager Aaron Boone said Wednesday that he expects Schmidt (elbow/forearm) to play catch Thursday, Jorge Castillo of ESPN.com reports.
Yankees manager Aaron Boone said Wednesday that Judge (rib) has been cleared to begin light activities, which includes outdoor running and upper-body resistance work, Erik Boland of Newsday reports.
