YOU SAID:
I play a forward in soccer.
INTO JAPANESE
私はサッカーでフォワードをします。
BACK INTO ENGLISH
I play soccer forward
INTO JAPANESE
私は前にサッカーをします
BACK INTO ENGLISH
I play soccer before
INTO JAPANESE
私は以前サッカーをします
BACK INTO ENGLISH
I play soccer before
That didn't even make that much sense in English.