Irving, Tex. ? Terrell Owens missed practice again Thursday, virtually ensuring he will miss his third straight preseason game for the Dallas Cowboys this weekend and might not play until the regular-season opener.

Owens missed 15 of 27 training camp workouts in Oxnard, Calif., and the first two exhibition games before the Cowboys resumed practice at home Wednesday.

Owens said Wednesday he aggravated his left hamstring injury by returning to practice too soon last week. The receiver characterized his injury as a “severe pull” and said he wasn’t going to jeopardize his health by rushing back again.

The Cowboys play San Francisco, Owens’ original team, Saturday night. They play Minnesota their last preseason game five nights later.

It’s possible Owens might not play in a game until the Sept. 10 opener at Jacksonville.