Chiefs QB Cassel leaves game vs. Seahawks after hurting left leg

KANSAS CITY, Mo. -- Chiefs quarterback Matt Cassel left the field Saturday night favoring his left leg after being sacked on the third play of Kansas City's preseason game against the Seattle Seahawks.

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Cassel was sacked by Brandon Mebane on the first passing play. Cassel appeared to have a problem with his left leg, but he came off the field unassisted before being replaced by Tyler Thigpen.

Cassel signed a long-term contract with the Chiefs with a guarantee of $28 million after being acquired in an offseason trade with the New England Patriots.

Copyright 2009 by The Associated Press