After rookie Brice Matthews' coming-out party Monday, Houston will turn to veteran ace left-hander Framber Valdez in an attempt to win the series from the Arizona Diamondbacks on Tuesday.

Standards have become massive in Houston, where second-half winning streaks are almost treated as standard operating procedure. Pennants are the barometer by which all Astros teams are measured.

Arizona Diamondbacks vs Houston Astros Pitching Matchups Monday, July 21: RHP Zac Gallen (5.40 ERA) vs LHP Colton Gordon (4.67 ERA) The former D-backs ace appeared to have turned

Christian Walker hit a tiebreaking home run in the sixth inning and the Houston Astros went on to rout the host Seattle Mariners 11-3 Sunday afternoon.

Starter Hunter Brown had an off-day but the Astros offense managed 13 hits and 11 runs to stop a two-game skid against Seattle.