Martinez is listed as the Rangers' probable starter for Friday's game against the Angels, MLB.com reports.
Manager Jeff Banister acknowledged earlier this week that A.J. Griffin was at risk of losing his rotation spot after four poor outings in a row, and it appears the Rangers skipper has decided to bite the bullet and turn to a new fifth starter in Martinez. The right-hander has shuttled between starting and relief duties all season to poor results, with his 5.40 ERA and 5.4 K/9 rate over 95 innings limiting his fantasy appeal. While he'll have more value in a starting role, Martinez's shaky track record won't make him an enticing streamer in most deeper mixed leagues.