C/G Luke Bowanko 2017: The Ravens traded for Bowanko shortly before the regular season began to bolster their interior offensive line and overall depth. He played in all 16 games (started one) and served as the team's sixth blocker in heavy-package situations. Outlook: Baltimore would be somewhat thin if it lost Ryan Jensen and Bowanko both to free agency. Depending on the interest elsewhere and price, Bowanko could return to most likely a backup role.

CB Brandon Boykin 2017: Boykin didn't play last year, as he was placed on injured reserve at the end of training camp. Outlook: Boykin struggled during training camp last year. With Tavon Young coming back from a torn ACL and Maurice Canady emerging as a nickel option, the Ravens are stacked at the position.

WR/RS Michael Campanaro 2017: Campanaro had his healthiest season since being drafted by the Ravens in the seventh round in 2014. He played in 13 games and made 19 catches for 173 yards and a touchdown, but made his biggest contributions on special teams as one of the AFC's best returners. Outlook: The Ravens don't have another proven punt returner on the roster and Campanaro has always flashed potential as a slot receiver. The local product could stay on a relatively low-end deal.

TE Crockett Gillmore 2017: Gillmore spent the season on injured reserve after tearing his ACL during training camp. Outlook: Gillmore has dealt with a long list of injuries over his career, and hasn't had the breakout that he and others have long hoped for. The Ravens have a stable of tight ends and are looking for a more dynamic pass-catcher.

G/T James Hurst 2017: Hurst started all 16 games at left guard last season and held up well, especially considering it was his first time playing the position. He allowed just three sacks over the course of the year. Outlook: The Ravens have Marshal Yanda and Alex Lewis returning, but Hurst provides valuable flexibility to play guard or tackle, and proved he can be a full-time starter. Assistant General Manager Eric DeCosta said he would like to re-sign Hurst.

G/C Ryan Jensen 2017: In his fifth year, Jensen became a full-time starter at center for the first time. He brought a physical style of play and was among the league's most effective blockers in the middle. Outlook: Jensen could get a a bigger contract in Baltimore or elsewhere. The top 10 centers in the league average $8 million and above per year.

ILB Steven Johnson 2017: Signed midway through last season, Johnson played in all 10 games after coming to Baltimore. He was used on special teams and made five tackles. Outlook: The Ravens had a very strong special teams unit last year, and Johnson was a part of that. But fellow veteran linebacker and special teams ace Albert McClellan is also coming back from a season-ending knee injury.

QB Ryan Mallett 2017: Mallett didn't start any games last season as Joe Flacco played the entire year, including with an ailing back at the beginning of the year. In blowout duty in London and when Flacco suffered a concussion against the Miami Dolphins, Mallett performed well, completing 9 of 16 passes and two touchdowns. Outlook: The Ravens have expressed the desire to draft a quarterback this year, who would likely become a more inexpensive backup to Flacco.

DE Brent Urban 2017: Urban was a breakout candidate entering the year as the starting five-technique defensive end, but he suffered a Lisfranc foot injury in London in Week 3 that knocked him out for the rest of the season. Outlook: Head Coach John Harbaugh said he's "all for" re-signing Urban, who would again compete for the starting job with Bronson Kaufusi, Chris Wormley and Willie Henry.

WR Mike Wallace 2017: After topping 1,000 yards in 2016, Wallace's production dipped last season along with the other Ravens wide receivers. He posted 52 catches for 748 yards and four touchdowns. Outlook: Wallace enjoyed his two years in Baltimore and said he's open to coming back. The Ravens have expressed their desire to add playmakers, and could be looking for cheaper and/or younger options.

TE Benjamin Watson 2017: Watson led the Ravens in receptions (61) and notched 522 receiving yards and four touchdowns. He was a valuable chain-moving option with reliable hands. He's also a leader in the locker room and in the community. Outlook: Watson is 37 years old and unsure if he wants to retire. The Ravens are looking for a young pass-catching tight end. 

RB Terrance West 2017: West began the year as the starter, but a calf injury sidelined him for several weeks and he lost his job to Alex Collins when he was healthy. He suited up for a game after returning, but didn't see any carries. Outlook: With Collins, Danny Woodhead, Buck Allen and Kenneth Dixon under contract, the Ravens have a lot of depth at the position already. Baltimore could also draft a running back.

WR Quincy Adeboyejo Exclusive rights free agent

RB Alex Collins Exclusive rights free agent

CB Jean Bapstiste-Stanley Exclusive rights free agent

TE Vince Mayle Exclusive rights free agent

ILB Patrick Onwuasor Exclusive rights free agent

G Maurquice Shakir Exclusive rights free agent

G/C Matt Skura Exclusive rights free agent