Whiteoak débuted on 30 July 1987, winning with an impressive opening score of 79. After bottoming out at 42 in his fourth game, he climbed to 80 points - one of the highest 9-round scores ever - before losing to Nita Marr in his sixth game. He returned to the finals 15 days later, outrunning the same opponent he beat in his first game, Peter Tatlow, in a high-scoring quarter-final. Whiteoak’s run eventually ended with defeat to Kevin Nelson in a close semi-final.
He returned to Countdown in 2013, as one of 41 contestants taking part in the 30th Birthday Championship. After receiving a bye to the first round, he lost his only match against Series 44 semi-finalist Dave Hoskisson by a score of 85 – 81.
Whiteoak is also a tournament Scrabble player. He appeared on The Chase on 7 March 2018.
|#||Date||Type||Contestant 1||Score||Contestant 2||Guest||Lex||Max|
|623||30/07/1987||P||Peter Tatlow||59 – 79||Mike Whiteoak||Lance Percival||Freda Thornton||86|
|624||31/07/1987||P||Dave Edgerley||25 – 43||Mike Whiteoak||Lance Percival||Freda Thornton||68|
|625||3/08/1987||P||Vince O'Donnell||24 – 59||Mike Whiteoak||Lance Percival||Freda Thornton||71|
|626||4/08/1987||P||George Orgill||37 – 42||Mike Whiteoak||Diane Solomon||Freda Thornton||82|
|627||5/08/1987||P||Derek Edwards||52 – 80||Mike Whiteoak||Diane Solomon||Freda Thornton||83|
|628||6/08/1987||P||Nita Marr||45 – 39||Mike Whiteoak||Diane Solomon||Freda Thornton||69|
|639||21/08/1987||QF||Peter Tatlow||69 – 74||Mike Whiteoak||Derek Nimmo||Catherine Clarke||83|
|643||27/08/1987||SF||Kevin Nelson||56 – 53||Mike Whiteoak||Derek Nimmo||Catherine Clarke||96|
|M42||15/01/1990-19/01/1990||M||Mike Whiteoak||49 – 96||Gavin Rogers||none||Freda Thornton||140|
|5632||30/01/2013||30B1||Dave Hoskisson||85 – 81||Mike Whiteoak||Mark Foster||Susie Dent||125|