ARLINGTON -- The Rangers are calling up pitcher Martin Perez from Triple-A Round Rock. He will be at the Ballpark in Arlington for Tuesday's game against the Tigers.

The Rangers have not made a corresponding move, but they need Perez in the bullpen after Michael Kirkman pitched five innings in relief of Justin Grimm in Monday's 8-2 loss. Both Kirkman and Mark Lowe, who pitched three innings, are unavailable for Tuesday's game. Kirkman still has options.

Perez is 5-5 with a 4.59 ERA in 15 starts at Round Rock, but has won his last two starts. In 16 innings during that span, he allowed four hits, seven walks and nine strikeouts while giving up only two runs.

Grimm allowed six runs in one-plus inning Monday. His next scheduled start is Saturday against Oakland, but the Rangers could go with Scott Feldman if they want to make a change.