Marshall returns shot at Adam Jones

Posted by ESPN.com's Bill Williamson

The sudden Jones-Marshall feud hit a new level at the Broncos-Cowboys dual workout this afternoon.

After Adam Jones, in his first season as a Cowboys cornerback, said Denver receiver Brandon Marshall doesn't compare to Dallas receiver Terrell Owens, Marshall struck back. He came onto the practice field for the second workout with a sign taped to the back of his jersey reading, "21's no Champ."

Jones wears No. 21. Champ, of course, is Denver's superstar cornerback Champ Bailey.

Pretty good stuff for a training camp workout, huh? It will be fun to see if Jones and Marshall cross paths Saturday night when the two teams play a preseason game in Denver.