Free MLB Betting Odds & Picks on the Texas Rangers vs. Seattle Mariners Monday night game 1 matchup. The Mariners are +120 underdogs. The over/under is set at 6.5. Q likes the road team in this one 3-2. The Rangers have leveled off after a fast start, going 4-5 in their last nine. Felix Hernandez is entering Monday off of back to back poor outings. At the dish Josh Hamilton has cooled for Texas.