BEAUMONT, Texas — It's a must-win, winner take all game that could cement an Astros dynasty. 

The thing for the Astros -- they must win at home. They won three on the road against the Nationals, but have yet to utilize that 'home field advantage'. 

Astros Pitching Order: The Astros are hoping star pitcher Zack Greinke can get it going for the 'Stros. 

Greinke will be going against the Nationals’ Max Scherzer.  

It's being called one of the best Game 7 pitching matchups since the 2001 Yankees-Diamondbacks game when Roger Clemens was on the mound against Curt Schilling. 

Greinke and Scherzer are both former Cy Young Award winners.

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First Pitch: The Astros are calling on a couple Hall of Famers to get the home crowd ready. Jeff Bagwell and Craig Biggio will simultaneously throw out the ceremonial first pitches. 

Play Ball!:  Texans quarterback Deshaun Watson will be there to make the ‘Play Ball’ call.  

National Anthem: For the second straight night, the national anthem will have a little country flavor to it as Texas country music artist Cody Johnson performs. 

Johnson is from Huntsville, Texas. 

Game 7: Wednesday, Oct. 30, Minute Maid Park, 7:08 p.m.

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