Dallas Cowboys Injuries
Mike Jackson Sr.
Heath didn't play in Saturday's preseason game due to a neck stinger, Calvin Watkins of The Dallas Morning News reports.
Smith will not play during Saturday's preseason tilt against the Rams due to a stiff back, Calvin Watkins of The Dallas Morning News reports.
Cooper's heel injury is believed to be muscular, rather than the ligament issue or plantar fasciitis that previously was reported, Todd Archer of ESPN.com reports.
Martin (back) is improving but has no set timetable for a return to practice, Mickey Spagnola of the Cowboys' official site reports.