The eighth and final member of this list is center fielder Shin-Soo Choo.
Choo was brought in prior to last season in a three-team deal involving the Diamondbacks, Indians and Reds. The 30-year-old was expected to move to a new position—center field—and occupy the leadoff spot in the team's lineup
The 30-year-old did both with varying levels of success. In the outfield, it was clear that Choo was out of his element. In just his seventh game, Choo's lack of fly-ball reading skills as a center fielder reared its' ugly head in the form of two errors against the St. Louis Cardinals.
However, as the season progressed, so did Choo's ability to read, and react to fly balls in center field. Nobody expected Choo to be the best center fielder in the league, but he was certainly a serviceable one.
Offensively, Choo had few equals at his position. Among MLB center fielders, Choo ranked in the top-five in batting average, doubles, walks, OBP, SLG, OPS, pitches per-plate appearance, total bases, extra-base hits, runs created and walks per-strikeout, via ESPN.com.
Choo dominated offensively and was able to set the table for the likes of Joey Votto, Brandon Phillips and Jay Bruce. His ability to step in and fill a huge void in the team's lineup was a humongous factor in the team's success throughout the 2013 season.
The problem for the Reds is going to lie in their ability to offer a deal in line with what Choo and his agent Scott Boras feel is fair. According to CBSsports.com's Jon Heyman, Boras feels that his client is worth significantly more than $100 million on the open market.
Choo brings an incredible amount of value to the table as a leadoff hitter with plus-power and on-base skills, so it's likely that he'll be able to command anywhere in the neighborhood of $80-100 million this offseason.
If this is in fact the case, and there is a team willing to offer Choo a $100 million-plus contract, then the Reds have little hope of re-signing him. The Reds already have sizable commitments to Joey Votto and Brandon Phillips, and they'll have to deal with the prospects of re-signing Homer Bailey, Mat Latos, Jay Bruce, Aroldis Chapman and several other key players in the upcoming years.
If Choo struggles to find a taker on his massive contract—e.g. Michael Bourn in 2012—then the Reds may be able to land Choo. The most likely scenario though, is that the Reds offer Choo a one-year tender in the hopes that he may flop out of the market, and if he doesn't, they'll get a compensatory pick in the upcoming draft.
Chances of Returning: 30 percent