Brandon Meriweather put on IR
Murphy joined the team Tuesday as the Redskins prepared for Thursday's game against the Dallas Cowboys.
Meriweather tore the ACL in his right knee in Sunday's 31-6 win over the Philadelphia Eagles. It was his first game of the season after missing the first nine with a sprained left knee.
The Lions released him on Sept. 29.
Copyright 2012 by The Associated Press
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