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10 free agent relievers the Tigers could still sign before spring training

They only need to sign one, not all 10.

Robert Deutsch-USA TODAY Sports

Admit it, you're still not comfortable. The Detroit Tigers have worked hard to revamp their long-beleaguered bullpen this offseason, acquiring proven relievers Francisco Rodriguez, Mark Lowe, and Justin Wilson to handle the late innings. They will be joined by Alex Wilson and Blaine Hardy, a pair of underrated arms coming off excellent 2015 seasons. Then there's Bruce Rondon, who throws 100 miles per hour, and Drew VerHagen, who showed promise with his bowling ball sinker towards the end of 2015.

However, after nine consecutive years of below-average production, it still doesn't feel like enough. Many fans, myself included, would like to see the Tigers acquire another arm before spring training.

Fortunately, the Tigers might be looking at a buyer's market. There are a plethora of solid bullpen arms still available on the free agent market, many of which we identified earlier this offseason as possible contributors in 2016. Some of them have their warts, but all could come at a bit of a discount this late in the offseason.

RHP Tyler Clippard

The most popular name still available in free agency is Tyler Clippard, who pitched for the Oakland A's and New York Mets last season. He put up solid numbers for most of the year, but struggled down the stretch and in the playoffs. Clippard's fastball has also declined in the past couple years, while his once-astronomical pop-up rate came back to earth (pun intended) last year. He has a long track record of success, with a 2.88 ERA and 2.66 strikeout-to-walk ratio in 562 career innings.

RHP Casey Janssen

The former Toronto Blue Jays closer had a rough year for the Nationals in 2015, allowing a 4.95 ERA in 40 innings. He has never relied on a high-octane fastball, but his velocity dipped to just 88.9 miles per hour last year. He has a career 45.8 percent ground ball rate, but has been below 35 percent in the past two years while allowing more fly balls. He posted significant reverse splits last season, but his solid numbers against lefties (in 60 plate appearances) may just be a mirage.

RHP Tommy Hunter

Hunter can get homer-happy at times, such as his stretch run with the Chicago Cubs, but he has a big fastball and solid command. While he struggled to get hitters out in 15 2/3 innings with the Cubs, he also struck out 15 batters to just three walks. Since moving to the bullpen full-time in 2013, Hunter has a 3.26 ERA and 1.10 WHIP.

RHP Jason Frasor

The 38-year-old Frasor was released by two teams last season, and dealt with shoulder issues while pitching just 28 innings. Signing that pitcher sounds like a bad idea, but Frasor is just one year removed from a 3.28 FIP and 1.23 WHIP in 47 1/3 innings with the Rangers and Royals. He may be headed for a minor league deal at some point, and would be an interesting buy-low candidate for the Tigers.

LHP Matt Thornton

Our own Patrick OKennedy has long been a Thornton apologist, but for good reason. The Three Rivers, MI native -- Thornton, not Patrick -- has held opponents to a 1.98 ERA and 1.10 WHIP in the past two seasons. He hasn't logged a ton of innings, but has remained largely healthy into his late 30s. He is hell on lefties as well, holding them to a .484 OPS in 88 plate appearances last season.

RHP Justin Masterson

Masterson signed a one-year contract with the Boston Red Sox last season in hopes of rebuilding his value as an above average starting pitcher. It didn't work. Instead, the 30-year-old righty made just nine starts, allowing a 5.61 ERA in 59 1/3 innings. He has been very effective against right-handed hitters in his career, and his sinker-slider combo is deadly when he's healthy. Just keep him away from Don Kelly.

RHP Burke Badenhop

Originally drafted by the Tigers way back in 2005, Badenhop has carved out a successful MLB career in spite of a fastball that barely scrapes 90 miles per hour. His strikeout rate is equally pedestrian, resulting in a career 2.29 strikeout-to-walk ratio. Where Badenhop excels is in keeping the ball on the ground -- with a career 54.4 percent ground ball rate -- and limiting home runs. He hasn't had many lights out years, save for a 2.29 ERA in 2014, but has a 124 ERA+ in the past four seasons.

LHP Franklin Morales

Morales' career numbers aren't very pretty, but that will happen when you spend half of your career pitching for the Colorado Rockies. He has improved outside of Coors, and posted a 3.18 ERA and 3.52 FIP in 62 1/3 innings with the Royals last season. Those numbers were thanks to a major improvement in his walk rate, which many teams seem to be wary of this offseason.

LHP Manny Parra

Parra is a relatively nondescript lefty who posted some odd reverse splits in 2015. His career numbers are more traditional, though lefties have still hit .254/.330/.391 against him. Parra settled in with the Cincinnati Reds over the past few seasons, allowing a 3.91 ERA and 3.45 FIP in 115 innings. He has struggled to return to the batter-per-inning strikeout rate he posted early on in his career, but keeps the ball on the ground often enough to survive. He did have some injury concerns last year, though.

RHP Bobby Parnell

The 31-year-old Parnell is the deepest flier on this list, but one with serious boom-or-bust potential. Prior to undergoing Tommy John surgery in 2014, Parnell used a high-90s fastball to earn the New York Mets' closer job, where he converted 22 of 26 save opportunities in 2013. His return from surgery didn't go well, but his fastball velocity improved as the year went on. If his command returns, he could be a major asset.