fbaezer - your wish is my command
However, it's kinda new sport in Croatia, so in many cases people actually use English terms
Bejzbol
The field - teren
The diamond - dijamant
Home - kuca (house)
The pitching mound - brdo (hill)
Infield - infield
First base - prva baza
Second base - druga baza
Third base - treca baza
Outfield - polje (field)
Pitcher - bacac (thrower)
Catcher - hvatac (catcher)
First baseman - prvobazni igrac (first base player)
Second Baseman - drugobazni igrac
Short Stop - short stop
Third Baseman - trecebazni igrac
Outfielder - vanjski (outfielder) - lijevi (left), srednji (central), desni (right)
Designed Hitter - zamjenski udarac (replacement hitter)
innings: izmjene, inninzi
throw: bacanje
strike: strike, dobra lopta (fair ball)
ball: lopta
foul: faul
out: out
strikeout: strikeout, izbacaj (throwing out)
walk, base on balls: setnja (walk), cetiri lose (four bad)
hit by pitch: hit by pitch
hit: udarac (hit)
error: pogreska
single: single
double: double
triple: triple
home run: home run, optrcavanje (running around)
fly: fly
ground ball: niska lopta (low ball)
run: trcanje
double play: double play, dvostruko izbacivanje (double out)
assist: asistencija
bunt: bant
sacrifice: zrtvovanje (sacrifice)
wild pitch: wild pitch
balk: balk
interference: ometanje (interference)
steal: kradja (steal)