Greinke (neck) will start Thursday's game against the Rangers, Brian McTaggart of MLB.com reports.
The Astros could have given the 36-year-old an extra day of rest coming out of Saturday's doubleheader, but he'll remain on four days' rest and start Thursday's series finale. Greinke worked through a stiff neck in his last start, but it's apparently no longer a concern. The veteran has a 2.68 ERA, 0.94 WHIP and 35:6 K:BB through 40.1 innings this season.