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Kansas City, MO -- Matt Ryan threw for 299 yards and three touchdowns and also ran for a score to lead the Atlanta Falcons to a 40-24 thumping of the Kansas City Chiefs on Sunday.

Julio Jones hauled in six balls for 108 yards and two touchdowns and Tony Gonzalez caught a touchdown pass against his former team for the Falcons (1-0), who were eliminated in the wild-card round of the NFC playoffs by the New York Giants last season.

After a strong first half, Matt Cassel finished 21-of-33 for 258 yards with a touchdown and two interceptions. Dexter McCluster caught six passes for 82 yards and Kevin Boss caught two passes for 36 yards, including a 22-yard touchdown reception for the Chiefs (0-1), who finished 7-9 in 2011.