Martinez started in left field and went 1-for-4 with a double in Saturday's 6-5 extra-inning win over Seattle.
Martinez parlayed a productive spring (1.196 OPS) into an Opening Day roster spot but not a role as a lineup regular. The Guardians have a few outfield prospects on the roster, including the red-hot Chase DeLauter (four HR), so Martinez may be limited to one or two starts per week. When George Valera (calf) is ready to rejoin the team, that could further cap opportunities for Martinez, or even lead to a demotion to the minors.