Seattle is 23-35 to the under this year, so they are an under machine - Kirby vs Spence here, Kirby ERA 4.03 but WHIP only 1.02, so he's pretty good at limiting baserunners - Mitch Spence has been phenomenal his last 3 games with a 2.08 ERA and 1.23 WHIP in that span - We get two bottom 10 offenses in MLB, and two top-10 bullpens in the league as well, mix it all up and I like the under here between the Mariners and the A's