Nathan Peterman needed only 30 minutes to throw five interceptions and convince the Bills coaches that they had made a colossal mistake by benching Tyrod Taylor.
However, by that time, the Bills were down by 25-plus points and any statistics Taylor put up must be measured with a grain of salt.
By now most Bills fans are aware that Buffalo's offense has been slow in getting into a rhythm at the start of games.
But Peterman threw his third interception to Tre Boston while getting planted on his back by Bosa, and Allen then caught his first touchdown pass since the Chargers' opener on a handsome back-shoulder throw by Rivers.
The Bills responded back in a major way, as running back LeSean McCoy on two plays was responsible for Buffalo's tying touchdown.
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Rivers passed for 250 yards and Keenan Allen had 12 receptions for 159 yards and two touchdowns for the Chargers (4-6), whose offence capitalized on the extraordinary bounty created by its defence.
Nick Novak's second field goal, a 27-yarder, gave the Chargers a 27-7 cushion midway through the second quarter.
When it was announced that Peterman would be the Bills' starter for Week 11, the decision felt even more odd - the Bills were right in the hunt of the AFC Wild Card picture, and Taylor's play had largely been solid on the whole, with 1,600 passing yards, 10 touchdowns, and just three interceptions on the year. He also ran for a score in the fourth quarter. Meanwhile, the 37 points the Bills allowed in the first half were the most the Bills have allowed in a half since 1977 against the Seahawks.
Bills kicker Stephen Hauschka set an National Football League record by making his 13th consecutive field goal of 50 yards or longer during the third quarter.
Peterman, a fifth-round pick from Pittsburgh, was terrible as he made bad decisions and he couldn't handle the Chargers' pass rush.