Runs came at a premium when the Houston Astros won the opener of a three-game series with the Seattle Mariners 2-1 yesterday. I think we'll see another low-scoring affair Tuesday night as the series at Minute Maid Park continues.

Here are my keys to the game:

1. Pitching - The Astros hand the ball to Dallas Keuchel (5-9, 5.13). The reigning American League Cy Young winner has bounced back from a terrible start to the year and has held opponents to seven earned runs over 19 1/3 innings in his last three starts. Keuchel's season ERA is more than one run lower home in Houston than on the road. The Mariners counter with Taijuan Walker (4-6, 3.29 ERA). He missed a start due to a foot injury but came back strong to hold the Orioles to one run on four hits in 6 1/3 innings of a 5-3 win his last outing. Walker has posted a 2.00 ERA in two meetings with Houston this year.

2. Batter Versus Pitcher - Taijuan Walker has posted a 3.98 ERA in 10 career starts against the Astros, but he has done well against several of their current big bats. Carlos Correa (2-for-9), George Springer (3-for-13) and Luis Valbuena (2-for-11) have all struggled to solve the right-hander.

3. X-Factor - The under is 9-3-1 in the Astros' last 13 home games vs. a right-handed starter and 5-1 in their last six home games overall.

Selection: This is a play on SEA@HOU to go UNDER the total (10*)