Zack Greinke suffers from a sore arm and will not start for the Astros on Wednesday. Jose Urquidy will take his place.

Moments after Tuesday’s game, which put the Astros one win away from their fourth consecutive trip to the AL Championship Series, Greinke came onto the field while members of the team’s taxi squad went through a workout. He threw somewhere in the neighborhood of 15 pitches off flat ground at what appeared to be minimal intensity, then sat on the short fence in right-field foul territory alongside Astros pitching coach Brent Strom. The two engaged in a long conversation before walking off the field together.

ESPN.com

It’s not clear if Greinke will miss one game or more.