Football fan jailed for attacking Sheffield Wednesday goalkeeper Chris Kirkland . Aaron Cawley , 21 , also banned from matches for six years following assault . The incident happened in the second half of a game between the two sides at Hillsborough on April 15 1989. Leeds spokesman says the sentence was too lenient and club will ban him for life .
Football fan jailed for attacking Sheffield Wednesday goalkeeper Chris Kirkland . Aaron Cawley , 21 , also banned from matches for six years following assault . Leeds supporter invaded the pitch during match and knocked Kirkland down . Leeds spokesman says the sentence was too lenient and club will ban him for life .