Iheanachor (shoulder) is not participating at the Steelers' training camp practice Monday, Brian Batko of the Pittsburgh Post-Gazette reports.
Pittsburgh signed Powell on Monday, Brooke Pryor of ESPN.com reports.
The Cowboys signed Williams to a three-year, $105.9 million contract extension Monday, Ian Rapoport of NFL Network reports.
Pittman (leg) wasn't spotted at Monday's practice, Alan Saunders of SteelersNow.com reports.
Winstead and the Steelers agreed on a contract Sunday, Alan Saunders of SteelersNow.com reports.
Bullard (hamstring) worked with the rehab group Sunday, Nick Harris of the Fort Worth Star-Telegram reports.
Valdes-Scantling (undisclosed) did not participate in Sunday's practice, Calvin Watkins of The Dallas Morning News reports.
Thompson (hip) was cleared to participate in Saturday's training camp practice, Tommy Yarrish of the Cowboys' official site reports.
Steelers head coach Mike McCarthy said Friday that Iheanachor (upper body) will be held out of practice until Monday, Gerry Dulac of the Pittsburgh Post-Gazette reports.
Echols did not participate in Friday's training camp practice due to an ankle injury, Brooke Pryor of ESPN.com reports.
