Spring training is generally a time when many MLB veteran players work on getting in game shape and preparing for the rigors of a long 162-game schedule.
This spring, however, quite a few veterans have something to prove.
In some cases, veteran stars are working to come back from significant injuries, ready and willing to show their teams they're back to their old selves.
In other cases, younger stars who have yet to live up to their potential could be facing situations where spring training and the early part of the regular season could make or break their careers.
And in a few cases, veteran stars are out to prove to management that they are not in regression and still have what it takes to contribute on a daily basis.
For these players, they have everything to gain and a lot to lose.
Here are 12 MLB players who fit that criteria. Early season performance will also be included.