Martinez will remain in the rotation this week and make his next start Wednesday against the Astros, T.R. Sullivan of MLB.com reports.
The Rangers were deciding between Martinez and A.J. Griffin (ankle), who's eligible to return from the disabled list, but it appears they'll make room for both pitchers in the rotation this week. Yu Darvish will receive an extra day of rest between starts, likely leaving Griffin in line to take the mound Thursday against the Astros. Martinez may have forced the Rangers' hand with his two solid outings in Griffin's place, during which he turned in a 2.77 ERA and 10:1 K:BB over 13 innings. Griffin struggled in his most recent rehab outing with Triple-A Round Rock, so if he fails to outperform Martinez during their respective starts this week, the 26-year-old could potentially stick in the rotation beyond Wednesday.