Number twenty on the Bulls Advent Calendar is John Sillett.
After a playing career as a full back that saw him win the Football League title with Chelsea, Sillett retired aged 32 due to injury and became a coach at Bristol City. At the age of 37 in 1974, he was appointed as the Bulls' new manager replacing Colin Addison.
After an indifferent debut campaign in Division Three under Addison following promotion, Sillett improved the club to mid-table in his first season before winning the Division Three title in 1976 thanks to 37 goals from Dixie McNeil.
However that was to be the peak of the Bulls, and they sunk back into the third tier and then the fourth in successive seasons. Sillett resigned in February 1978 with the club facing the second relegation, resurfacing at Coventry a year later on the backroom staff.
With the Sky Blues, where he had spent four years as a promotion-winning player, he coached under several different managers including Jimmy Hill and ex-Bull Bobby Gould in several spells with the club. He eventually moved up the ladder to be 'chief coach' - with no manager in charge - and won the FA Cup in 1987.
Eventually earning the title of manager, he took Coventry to four successive top half finishes before being sacked early in the 1990/1 season. By the end of that term he was a regular visitor to Edgar Street, and his re-appointment in the summer of 1991 - replacing Addison for a second time - was unsurprising.
His second stint in charge at Edgar Street was quite indifferent. The Bulls ended up in 17th place in the basement division, and coach Greg Downs was considered to be in actual charge during the second half of the season with Sillett clashing with the board over funds to sign new players. Downs' first action when he eventually was handed the managerial reins was to cut four players from the wage bill.
Now 77, "Snoz" finished his career as a TV pundit and scout for the England side under Sven Goran Eriksson.