The Rangers optioned Martinez to Triple-A Round Rock on Thursday.
Texas will make a roster move to fill that spot before Friday's contest. Martinez was tagged for four runs (three earned) while allowing 11 baserunners in a relief outing Tuesday and was deemed replaceable, considering his 4.56 ERA, lowly 4.8 K/9 and lack of a clear avenue to rejoining the rotation. He should park at Round Rock for a bit until he's summoned to take another trip on the shuttle.