The Bills erased a late deficit and beat the Ravens 41-40 in a prime-time thriller, capped by a walk-off field goal from newly signed veteran Matt Prater. Josh Allen led a no-timeout, length-of-the-field drive built on sideline strikes and improvisation. Lamar Jackson dazzled for Baltimore in a back-and-forth shootout that produced 81 points. A statement season opener for Buffalo; a harsh lesson, not a collapse, for Baltimore.