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The first-place Phillies (71-53) have a 6-game lead over the New York Mets in the National League East. Seattle (68-57) is also in playoff contention as the second-place Mariners trail Houston by 1 1/2 games in the American League West.

The Seattle Mariners (68-57) and Philadelphia Phillies (71-53) meet Monday to start a 3-game series. First pitch at Citizens Bank Park in Philadelphia is ticketed for 6:40 p.m. ET (MLB Network). Let's analyze BetMGM Sportsbook's MLB odds around the Mariners vs. Phillies odds and make our expert MLB picks and predictions for the best bets.