|National Football League|
|July 31 2:34 PM PT3:34 PM MT4:34 PM CT5:34 PM ET21:34 GMT5:34 AM 北京时间2:34 PM MST4:34 PM EST4:34 PM CT1:34 UAE (+1)17:34 ET20:34 - The Dallas Cowboys have signed rookie free-agent defensive end Toby Jackson and released defensive tackle Ikponmwosa Igbinosun. The moves Wednesday are part of a revolving door on the defensive line as the Cowboys await the return of Anthony Spencer and Jay Ratliff and deal with a season-ending Achilles tendon tear for Tyrone Crawford.
Analysis: Igbinosun was in camp with Pittsburgh last year after signing as an undrafted free agent. The Cowboys picked up him at the end of last season, but he was hurt during the first week of camp.