Recruited from the Renmark Rovers in West Adelaide's country zone (
Riverland Football League), the talented tall
ruckman started his SANFL league career in 1981 and quickly established himself alongside Dexter Kennedy as the club's leading ruckman until Kennedy left to join
Port Adelaide at the end of 1982. After a stellar 1983 season as The Bloods number one ruckman, Mickan was cruelly robbed of the chance to play in West Adelaide's Grand Final win (the club's first in 22 years) over
Sturt due to a torn posterior
ligament suffered in Round 20 of the 22 round regular season against
Woodville at
Football Park in the early game of a double header. His place in the side was taken by tall Dirk de Jong, who had actually retired from league football earlier in the year but was persuaded to come back after Mickan's injury by coach
Neil Kerley. Strong seasons in 1983, 1985 and 1986 resulted in his winning club
Best & Fairest awards, while in 1986 West coach
John Cahill named him the team captain for the season. Following the 1986 SANFL season in which West Adelaide finished in seventh place, Mickan left to join the new Brisbane Bears playing in the
Victorian Football League (VFL) in
1987. Mickan's qualities as a leader and player were instantly recognised with his new club where he was appointed the inaugural captain by coach
Peter Knights. This is especially noteworthy given the team included
1986 club captain
Mark "Chocco" Williams, who was appointed as Mickan's vice-captain, as well as the 1985
Brownlow Medallist Brad Hardie. While the newly formed side suffered many crises during its early years Mickan's skills were recognised and he was named in the
All-Australian Team following the
1988 Bicentennial Carnival played in
Adelaide. Mickan returned to
South Australia to play for the newly formed
Australian Football League (AFL) team the
Adelaide Crows in
1991, winning Adelaide's inaugural
Club Champion award despite missing the first three rounds of the season due to Crows coach
Graham Cornes early preference for ruckman
Romano Negri. While not selected for the Crows opening three games, Mickan played the required three SANFL games with West Adelaide to qualify for SANFL finals football. Mickan became West Adelaide's number one ruckman, and played a prominent role in helping the
Kevin Morris coached Bloods to the SANFL Grand Final where they lost to
North Adelaide in a spiteful match which featured several all-in brawls. With younger ruckmen such as
Shaun Rehn (West Adelaide) and
David Pittman (
Norwood) quickly hitting their straps for the Crows and his form dropping, Mickan gradually fell out of favour with The Crows and coach Cornes to the point that he only played two games for the club in
1993, and played the majority of the year with West Adelaide. His form for The Bloods saw Mickan win his fourth club Best & Fairest award under the coaching of his original coach from back in 1981,
Neil Kerley. Following the 1994 SANFL season Mark Mickan retired from league football having played 139 SANFL games with West Adelaide, 48 VFL/AFL games with Brisbane and 37 AFL games with Adelaide between 1981 and 1994. Mickan also represented
South Australia on five occasions through his career ==Coaching career==