Bucs do solid work by re-signing Doug Martin, finding Mankins' replacement

The Bucs lost Logan Mankins to retirement but replaced him with former Seattle guard J.R. Sweezy. AP Photo/Rick Scuteri

A breakdown of the first week of free agency for the Tampa Bay Buccaneers:

Most significant signing: Running back Doug Martin doesn't count because the Bucs re-signed him hours before he became a free agent, so this honor goes to guard J.R. Sweezy. The Bucs needed a replacement for six-time All-Pro Logan Mankins, who retired March 7. They landed the 26-year-old Sweezy from Seattle with a five-year, $32.5 million contract ($14.5 million guaranteed). Sweezy is a tough, physical player who said he lives for run blocking. He brings the same kind of attitude that Mankins had throughout his 11-year career (the final two with the Bucs).

Most significant loss: The Bucs don't have any free agents that they absolutely needed to re-sign, especially on the defensive side of the ball. Had they not been able to get Martin signed before free agency there were reports that the Bucs would have had a hard time keeping him. He would have been the No. 1 back available.

Player they should have signed: The Bucs need help at defensive end and had Charles Johnson in for a visit but he instead re-signed with Carolina for a one-year deal worth $3 million because, as he told ESPN's Josina Anderson, his heart is in Carolina. Johnson, who has 63.5 career sacks in nine seasons, turned down $6 million from other teams to return to the Panthers.

What's next: The Bucs weren't big spenders overall but they were able to address two of their biggest needs and can now turn their attention to the NFL draft, in which they have the ninth pick. Numerous mock drafts had the Bucs linked to cornerback Vernon Hargreaves III and he could still be the pick despite the fact that the team signed cornerback Brent Grimes. Grimes turns 33 in July, so he's clearly not the long-term answer there.

Overall grade: B. It wasn't a splashy class, other than re-signing Martin, but it was solid work by GM Jason Licht. Adding defensive end Robert Ayers somewhat helps make up for missing out on Johnson, and the addition of Grimes instantly makes them better in the secondary. Re-signing safety Chris Conte helps, too.