IRVING, Texas -- The Dallas Cowboys promoted linebacker Keith Smith from the practice squad Saturday, waiving defensive end Lavar Edwards to make room on the roster. The Cowboys need depth at linebacker with Rolando McClain expected to miss Sunday's game against the St. Louis Rams due to a groin injury. McClain, the Cowboys' leading tackler, is listed as doubtful and did not practice this week. The Cowboys acquired Edwards on Aug. 30 by trading a conditional 2015 seventh-round pick to the Tennessee Titans.
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