Montero (elbow) was activated from the 10-day injured list Friday.
Montero was unavailable to begin the season as he dealt with right elbow tendinitis, but he'll be available out of the bullpen starting Friday. The right-hander should take on a high-leverage role in the bullpen and could see some save chances given the lack of experience among the Rangers' late-inning arms. Montero made 22 appearances for the Rangers last year, posting a 2.48 ERA and 0.97 WHIP over 29 innings.