League tampering rules prohibit teams from beginning the process of signing free agents before 12:01 a.m. tomorrow. But the sources, who requested anonymity because of the rules, said [Washington Redskins] owner Daniel Snyder and Vinny Cerrato, Washington's executive vice president of football operations, have already laid the groundwork to attempt to acquire Haynesworth, considered the top defensive player who could become available. Another option being considered by the team is [Chris] Canty, a versatile end who can play the run and pass rush from the interior on third downs.