Cowboys quarterback Tony Romo left Thursday’s preseason game against the Seahawks with an apparent back injury after being sacked.<br />Romo walked off the field on his own power.<br />He tried some throws on the sideline, but it was a coach’s decision to keep him out of the game.<br />Romo has played only 16 snaps in the preseason.<br />The Cowboys close the preseason Sept. 1 against the Houston Texans, but Romo has not played in a preseason finale since 2006.<br />I
