Peyton Manning is back, and the Broncos are in the end zone

So long, Brock Osweiler. Peyton Manning is back. After Broncos coach Gary Kubiak benched Osweiler for Manning with the Broncos trailing the Chargers 13-7 in the third quarter, Manning proceeded to march the Broncos’ offense down the field on a eight-play, 80-yard touchdown drive. Manning threw only two passes on the drive, gaining 20 yards,…