Because of the absence of a salary cap in Major League Baseball, many singular strong seasons get rewarded with huge contracts in hopes that players will replicate a big year. Many of these players don't sustain their production and acquire a nasty label: overpaid.
There are times when teams come to a decision point with certain high-priced players where they must evaluate whether the player, while obviously talented, is worth keeping and paying or dealing for something in return. Age and injury are relevant factors that go into the decision making process.
The following list contains a bevy of talented players that are, for one reason or another, not living up to their contract, but still hold considerable trade value.