Houston has clinched first place.
They have won 81 games and will finish the season ahead of the following teams:

Texas has won 80 games and has 0 games left to play; they will finish the season with at most 80 wins.

Seattle has won 76 games and has 0 games left to play; they will finish the season with at most 76 wins.

Oakland has won 64 games and has 0 games left to play; they will finish the season with at most 64 wins.

LAAngels has won 62 games and has 0 games left to play; they will finish the season with at most 62 wins.
# Houston Astros' magic number
# Houston's magic number
# Astros' magic number
# MLB Playoff Race