Just to play Devil's Advocate, I can think of one other reason to hold back a position player 20 games. It will save you a little money a couple seasons down the road.
For example, if you have an All Star type player, he might earn $2 million in his fourth season after his first arbitration, $5 million in the next season, and $8 million the next. If you save him for 20 games, he'll make $378,000 in what would have been his first arb year, then $2 million instead of 5, then $5 million instead of $8.
So that would be about $7-8 million in seasons 4-6. Not a lot, but enough to sign a decent relief pitcher for a couple of those seasons.
3/19/2015 4:53 PM (edited)