September 12 MLB betting slate centers on inflated moneylines as playoff pictures clear. Key bets include Rangers F5 -0.5 with deGrom on the mound, Brewers -1.5 at home behind Priester, and a Yankees-Red Sox duel shaped by injuries and head-to-head trends. The Mets have cooled since June, boosting value on fading favorites, while the Tigers and Marlins meet as road favorites on a big night.

Other notable line moves touch Padres over Rockies and a strong Brewers pulse at home. The article emphasizes watching bullpen depth and hot streaks, with multiple promos and sign-up offers fueling bettor enthusiasm across major sportsbooks.