Byung Ho Park is the eighth player whom the Twins have signed to a multi-year contract since 2010. Here's a look at those players and how they've worked out.
Ervin Santana -- Four years, $55 million (December 2014): Signed and then suspended before the start of the regular season for violating baseball's drug policy. He returned for the second half of 2015 and was inconsistent, with a 7-5 record and 4.00 ERA in 17 starts. Grade: D.
Ricky Nolasco -- Four years, $49 million (December 2013): An ugly 2014 season followed by an injury-shortened 2015. Some saw promise in his record last year; others saw bloated statistics that were worse than his mediocre debut season in Minnesota. Grade: D.
Phil Hughes -- Three years, $24 million: (December 2013): An excellent season in 2014 that earned a five-year contract extension (worth $58 million) was followed by a mediocre 2015 in which injuries played a role. (The new deal replaced his original 2015 and '16 salary.) Still considered the staff's top starter. Grade: B-plus.
Kevin Correia -- Two years, $10 million (December 2012): Bring in a mediocre pitcher, get mediocre results. Correia was 14-26 in 54 starts for the Twins before getting sent to the Dodgers in August 2014. Grade: C-minus
Josh Willingham -- Three years, $21 million (December 2011): After letting Michael Cuddyer leave through free agency, the twins brought in Josh Willingham and got an excellent season out of him (35 homers) in 2012. But he didn't do much afterward, batting .210 in an injury-marred 2013 and .208 before being traded to the Royals in 2014. Grade: B-minus.
Jamey Carroll -- Two years, $6.5 million November 2011): Signed as a utility player, but was a regular for most of the 2012 season before seeing less duty -- and being sold to Kansas City -- in August 2013. The twins got a bit more from him that many expected. Grade: B.
Tsuyoshi Nishioka -- Three years, $9.25 million (December 2010): There's really no way to describe, briefly, how badly this went for the Twins. Nishioka broke his leg six games into the 2011 season and was awful by any standard. He left the team midway through his three-year deal: Grade: F.
This list does not include pitcher Mike Pelfrey and catcher Kurt Suzuki, who originally signed one-year contracts before being re-signed to longer deals, or Twins players who came up with the team and signed multi-year contracts. That keeps us from arguing about Joe Mauer and Glen Perkins, at least for today.
Feel free to argue for a higher (or lower) grade in the comments.