Three of the four LCS participants have won two straight games in their respective series.
The Houston Astros achieved that feat to move level with the Texas Rangers in the ALCS.
The Astros should feel like they are the favorite to win the series now that they can turn to Justin Verlander to take an advantage over their in-state rival.
The Arizona Diamondbacks are the only team that has not won in two in a row in the LCS round.
Ketel Marte's walkoff single won a low-scoring NLCS Game 3. Arizona will try to ride the momentum into Game 4.