The previous receptions mark was 11, shared by Cincinnati's Dan Ross (1982 against the 49ers), San Francisco's Jerry Rice (1989 against the Bengals), and New England's Deion Branch (2005 against Philadelphia) and Wes Welker (2008 against the Giants).
Thomas has 15 catches for 188 yards and two TDs this postseason.
He came up two catches and four yards short of his career-highs 94 catches and 1,434 yards from last year, though his 14 TDs match his total from the last two seasons.
With Wes Welker out, he was targeted a season-high 14 times for his fourth 100-yard day in his last seven games.
He finished with 106 yards on three catches to post his second straight 1,000-yard receiving season.
The 121 receiving yards was the most for Thomas since the season-opener, when he gained 161 yards on five catches.
Thomas proved nearly unstoppable against the Chargers' weak secondary. He has now scored in three straight weeks and should remain a top-five option down the stretch. His nine TD receptions are tied with Calvin Johnson and teammates Julius Thomas and Wes Welker for second in the NFL.
Thomas has 29 catches for 393 yards and four scores for the Broncos. He ranks in the league's top 10 in all three categories.
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