Ladbrokes also quote 16/1 that Rooney’s horse beats another owned by his colleague or boss into second place in any race this year.
Rooney is also 50/1 to emulate Michael Owen with a Royal Ascot winner this year.
Alex Donohue of Ladbrokes said: “Rooney’s goals always cost us a fortune. We’re sure the horse will be no different and a big race win this summer will leave punters in the pink.”
He added: “It’s a great move for the sport and each payout will be worth every penny.”
To win first time out – 4/1
To beat a horse owned by Michael Owen or Sir Alex Ferguson into second this year – 16/1
To win at Royal Ascot this year – 50/1
Wayne Rooney to score and reveal a t shirt with a picture of the horse this season – 25/1
Pictures to be published of Wayne Rooney riding Switcharooney this year – 10/1
Wayne Rooney to take out a trainers licence before 2050 – 6/1
Wayne Rooney to parade the horse at Old Trafford at any time this year – 100/1
Switcharooney to have a hair transplant at any time – 250/1