 Long-term defender and club stalwart Nathan Bock announced he was leaving the club to join new side .These changes led to a disastrous 2011 campaign, which proved to be the worst season in the club's history.After a 103-point loss to fading champions , the club's longest-serving coach Neil Craig stepped down, handing the reins to assistant coach and former premiership captain Mark Bickley as caretaker for the remainder of the season.