Martinez will take the ball Saturday against the Cardinals, Evan Grant of the Dallas Morning News reports.
It came down to Martinez and Cesar Ramos, and the Rangers opted to go with the 25-year-old righty who managed a 3.98 FIP with just a 42:11 K:BB in 64 innings as a starter at Triple-A this season. Martinez is simply going to keep the spot in the rotation warm for Yu Darvish (shoulder), although if he struggles, Ramos or another pitcher could be given a shot while Darvish is on the DL. There is very little fantasy upside here.