Conversation so far:
what happened to roy keane in 1993?
a series of injuries kept him out of action.
what sport did he play?
CANNOTANSWER.
what accomplishments did he have during this period?
the winner in the Manchester derby.
what year did he win the manchester derby?
1993-94 season.
what other accomplishments did he have?
established himself as a first choice selection.
did he have any failures in this period?
was suspended for three matches and fined PS5,000.

Question: why was he suspended?
Self-contained rewrite: Why was Roy Keane suspended?