The Baltimore Ravens bolstered their pass rush by signing Pro Bowler Elvis Dumervil, filled Ed Reed's vacated spot at free safety with former All-Pro Michael Huff and shored up their defensive line by adding veterans Chris Canty and Marcus Spears.
So what still needs to be addressed? Here are three primary areas:
Ray Lewis retired, Dannell Ellerbe left as a free agent and Jameel McClain is working back from a spinal cord injury that ended his season last year. At this point, the Ravens' top three healthy inside linebackers are Josh Bynes, Albert McClellan and Brendon Ayanbadejo. Bynes, although he earned solid reviews when pressed into action last season, is a former undrafted free agent who began last season on the practice squad. McClellan started 11 games at outside linebacker last year and has played inside linebacker some in the past, but he's a former college defensive end who has played primarily outside linebacker at the NFL level. Ayanbadejo, meanwhile, is a 36-year old who, while respected for his presence on special teams, has seen limited action on defense during his career.
Look for Baltimore to address the position early in the NFL draft, with much-maligned former Notre Dame linebacker Manti Te'o being one potential player of interest.
Troubled but talented former Georgia linebacker Alec Ogletree could also warrant interest in the first round if he's still available, as could LSU's Kevin Minter, a player who doesn't have great speed - and didn't help himself by running a 4.81 in the 40-yard dash at the NFL Scouting Combine - but earns strong reviews for his physicality, instincts and presence against the run.
If Baltimore passes on an inside linebacker in the first round, Florida's Jon Bostic could be an intriguing option on the second day of the draft.
Bostic was a three-year starter at Florida who was among the top performers at the combine in the 40-yard dash (4.61), the 20-yard shuttle (4.24) and the 3-cone drill (6.99). A scouting report on Bostic done by NFL.com describes him as having been "an absolute hammer in the middle of [Florida's] defense, especially against the run."
Anquan Boldin was traded the San Francisco 49ers and, while the team has expressed confidence in some of its young receivers to help fill the void left by Boldin's departure, coach John Harbaugh acknowledged at the NFL's annual league meetings earlier this month that Baltimore will "probably" add a wide receiver through the draft.
And really, the Ravens may decide to do so as early as round one, especially if players like Keenan Allen (California) and DeAndre Hopkins (Clemson) are still available when they're on the clock.
Bryant McKinnie is a free agent and, if McKinnie isn't retained - which appears likely - the Ravens' best in-house option to replace him at left tackle is Michael Oher, who, while servicable there, has had problems when playing the position in the past and appears better suited for right tackle.
Kelechi Osemele has been mentioned as another potential in-house option at left tackle, but, based on his skill set, he appears to be a better fit at either guard or right tackle.
The problem for Baltimore is that beyond Oher, Osemele and McKinnie, there really just aren't many viable options.
The free-agent market has little to offer at this point and, as far as the draft, there's believed to be a significant drop-off in talent at left tackle after the top three rated prospects come off the board, and all three are expected to be selected well before the Ravens pick at No. 32.