OBP = On base percentage(number of times play got on base divided by at bats)
SLU = slugging percentage. (average number of bases earned per hit)
BA = batting average ( the number of times a player got a hit divided by the number of at bats)
FP = Fielding percentage ( the number of times a player made a clean play, whether the runner as safe or out, divided by the number of times they touched the ball)
E = error ( when a fielder makes an error)
S = steals (when a runner steals a base successfully)
SA = steal attempts ( the number of times a runner tries to steal a base)
Either hits or homeruns
an at bat
Depends on who hits it.
Games Started
Assists i think
Chances
batters faced
"R" is for runs scored which means the number of times a player crosses home plate.
yes
Left on base.
Stolen base average
OB as in OBP is on base percentage which is the average of the number of time you reach base in some why, other than an error, such as walks hits or you get hit by a pitch (HBP).