Free MLB Betting Odds & Picks on the Oakland A’s vs. Seattle Mariners Tuesday night game 2 matchup. The Mariners are -112 home favorites. The over/under is set at 7. Q likes the road team in this one 4-1. Travis Blackley, LHP (1-2, 3.89 ERA) vs. Jason Vargas, LHP (7-7, 4.66 ERA) in this one. Big surprise here. Seattle is continuing to sink the AL West.