If the Patriots make any major additions to the defensive line, it will likely be through a draft that is loaded with talent on that front. Plus, head coach Bill Belichick has historically only added rotational defensive linemen through free agency, with the exception of Gerard Warren, whose playing time really increased after Ty Warren's injury and Ron Brace's slow start.
Gerard Warren actually had a pretty good year, and the free agent said he definitely wants to return to New England. If the Patriots retain him and use one of their first-round picks on a defensive lineman, they'll have had a really good offseason at that position. With the return of Ty Warren and the assumed improvement of the Patriots' youngsters, their defensive line should be in good shape in 2011.
Here's a look at the 2011 class of free-agent defensive linemen.
Head of the Class
1. Haloti Ngata has been the key cog to the Ravens' defensive front for a few seasons, and he is one of the three best 3-4 defensive tackles in the NFL. Ngata should be in line for a huge contract, and if he opens it up for league-wide bidding, he'd almost certainly earn a bigger payday than Vince Wilfork's $40 million, five-year deal.
Diamond in the Rough
Mathias Kiwanuka is coming off a neck injury that kept him out of 13 games last season, but he still had four sacks. Kiwanuka is primarily a defensive end, but he has played outside linebacker, which gives him some versatility for any team that's interested. Kiwanuka, a Boston College product, has 23.5 sacks in 61 career games over five seasons. He'll get some good money this offseason, but the injury could limit that value. With his upside as a pass rusher, a team could get a bargain if Kiwanuka pans out.
Fit for New England
Defensive end Dave Ball is a rotational player whose career has improved in his last three seasons with the Titans. The 30-year-old had a career-high seven sacks in 2010, and he's had 11.5 in his last three seasons. If the Patriots can't re-sign Gerard Warren, Ball could fill in with that veteran presence.