[Nukester]

When a player and a team cant agree on a contract, it may go to arbitration, where a "neutral" third party will decide.

Infield range is basically the amount of ground a player can cover, or the ability to get to a ball to make a play. Big fat guys dont have much range. Speedy guys usually do.

Infield error is how good the players glove is. Whether he misshandles an easy groundball, or throws the ball away with a bad throw.

Infield arm is basically how hard the guy can throw the ball (I think IF error covers bad throws and not IF arm, but I might be wrong there)

Turn double play is exactly that. The ability to turn the double play. Some guys arent fast enough on "the pivot" (the pivot is the player at, for instance, 2B who receives the throw from a different infielder then has to throw to first base. The guy is basically a "pivot" point of the play)

Hope that helps a little