Smith, 26, now has the highest average salary of any player at his position in the NFL at $23.5 million annually.
The Chiefs had until 4 p.m. EDT Tuesday to work out a deal beyond this season after giving Smith the franchise tag in March. Smith and franchised Cincinnati receiver Tee Higgins each got a lucrative contract, though the agreements came roughly four months apart.
Smith has been a key part of the offensive line protecting two-time MVP quarterback Patrick Mahomes since entering the league in 2021 as a sixth-round draft pick out of Tennessee. Smith has started 67 regular-season and 13 playoff games, helping Kansas City win the Super Bowl twice and getting there last season before losing to Philadelphia.
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AP Pro Football Writer Rob Maaddi contributed to this report.
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