Boston at Colorado

Sonny Gray has been Boston's anchor all season, and tonight he takes the ball at 8-1 with a 3.12 ERA. He's delivered quality starts in four of his last five outings, consistently reaching the sixth inning while limiting opponents to two runs or fewer. Colorado sends rookie left-hander Sean Sullivan to answer him — a 10.29 ERA with an underlying FIP within a fraction of that, confirming the surface line isn't a luck story. The Rockies managed a 3-2 comeback win Monday on a four-hit ninth-inning rally off Boston's closer, but Colorado's pitching staff has posted the worst combined ERA in baseball over the past 30 days, and a run differential approaching minus-90 tells you where the actual talent sits against Boston's barely-negative mark. Sharp money has landed firmly on Boston to cover the runline tonight, and the pitching matchup tells you why. Gray wins on the runline tonight.