Josh Allen became the first quarterback since 1970 to score a rushing touchdown, pass for a touchdown and have a scoring reception in the same game and the Buffalo Bills clinched the AFC East for the fifth consecutive season with a convincing 35-10 victory over the San Francisco 49ers on Sunday night at Orchard Park, N.Y.Allen threw two touchdown passes, including one to himself, while joining four other players in the touchdown hat trick category.James Cook rushed for 107 yards and a touchdown as Buffalo (10-2) joined the Kansas City Chiefs as AFC teams to clinch postseason berths. Ray Davis rushed for a touchdown and Mack Hollins caught one for the Bills, who thrived in game-long snowy conditions.Brock Purdy (shoulder) returned from a one-game absence and completed 11 of 18 passes for 94 yards for the 49ers (5-7). Isaac Guerendo rushed for a touchdown for San Francisco, which lost its third straight game.The 49ers lost star running back Christian McCaffrey in the second quarter due to a knee injury. McCaffrey had 53 yards on seven carries and caught two passes for 14 yards before exiting.The Bills were leading 21-3 in the third quarter and had first-and-goal at the San Francisco 7-yard line when Allen tossed a short pass to Amari Cooper, who was tied up by Renardo Green of the 49ers. Cooper then lateraled the ball to Allen, who ran toward the corner of the goal line and dove in to make it a 25-point margin with 5:58 left in the period.Allen later tacked on an 8-yard TD run to make it 35-10 with 12:31 left in the game. He was 13-of-17 passing for 148 yards.The other players to have a rushing, passing and receiving touchdown in the same game since 1970 are McCaffrey (2022), LaDainian Tomlinson (2005), David Patten (2001) and Walter Payton (1979).Defensive lineman Nick Bosa (hip, oblique) missed his second straight game for the 49ers.