I dont believe all these fields exist for batch load. Just the following (info from the admin screen):
Put as many rows of players as you want in the following format:
FirstName LastName Jersey# Position Batting Bats Throws
Only FirstName and LastName are required.
The others are in the order most people have data for.
Position can either be the position # (1 = Pitcher, 2= Catcher, etc) or abbreviation for the position (1B = First Base, LF = Left Field, etc).
Batting can be: Y = Yes, N = No, D = DP, F = Flex.
Bats and Throws can be: R = Right, L = Left, B = Both
Joe Smith 5 2b y r r
John Doe 8 rf n l r
This would add:
#5 Joe Smith as a second baseman in the batting lineup who bats right handed and throws right handed, and #8 John Doe as a right fielder not in the batting lineup who bats left handed and throws right handed.