Blount picked up 76 yards on 16 carries for the Patriots (11-4), who clinched their fifth straight division crown earlier Sunday when Buffalo beat Miami.
Tom Brady made good on 14-of-26 passes for 172 yards with a touchdown.
Logan Ryan notched a pair of interceptions while Chandler Jones and Tavon Wilson each added a defensive score as the Patriots kept pace one game behind Denver for the AFC's best record.
Joe Flacco was sacked four times for the Ravens (8-7), whose loss handed the AFC North title to Cincinnati.
He finished 22-of-38 through the air for 260 yards and ran for a touchdown.
The Ravens' quest for an AFC wild-card berth remained unsettled heading into the final week of the regular season.