On November 11th, 1990, Derrick Thomas broke the NFL record for sacks in a single game previously held by Fred Dean with seven against the Seattle Seahawks at Arrowhead Stadium.
Despite Thomas’ efforts, the Chiefs ended up losing 17-16 when Dave Krieg found Paul Skansi for a 25-yard touchdown pass on the last play with Krieg escaping Thomas’ eight sack. The Seahawks actually led for most of the third quarter until Thomas forced Krieg to fumble on a vicious blind-side hit at the goal line, and Dan Saleaumua recovered for the Chiefs’ only touchdown. Even more impressive is that the Seahawks had to drive nearly the length of the field with under a minute left with no timeouts left to score the winning TD.
Thomas would later say that he would give up every one of his seven sacks if it meant the Chiefs would get the “W”.
The Seahawks would ultimately miss the playoffs in 1990 despite fighting back after an 0-3 start to earn a 9-7 record.
The Chiefs would make the playoffs as a wild card, but lost to the Miami Dolphins 17-16 after going into the 4th quarter with a 16-3 lead. Dan Marino threw two touchdowns in the 4th quarter (one of which was almost picked off at the goal line, and probably would have been run back for an easy six), and Nick Lowery came up short on a 50-yard field goal attempt with under a minute left.
Derrick Thomas did lead the NFL in sacks in 1990 with twenty.