Hatcher, who joined the side from the Dallas Cowboys in a big-money deal, has undergone arthroscopic surgery, but is expected to be ready for the team's summer camp.
"I like our guys. I really do," said coach Haslett, according to the NFL's official website.
""We've got a good group. We've got some versatility to do different things."
Washington will be looking to bounce back from a poor showing in the defensive department last season, where the Skins conceded 29.9 points per game - the second worst in the NFL.