He was known to snarl at the opposition prior to plays .
Consistently cited as one of football 's meanest , toughest , and most feared players , Butkus was renowned for his intimidating profile and style of play .
Butkus was known to snarl at the opposition prior to plays .
Consistently cited as one of football 's meanest , toughest , and most feared players , Butkus was renowned for his intimidating profile and style of play .