The MVRC committee omitted Mourinho from the 2014 Cox Plate field but the eight-year-old has since added a trio of Group II wins to his record while the Underwood Stakes win enhanced his case for a run in Australasia's weight-for-age championship on October 24.
Mourinho disappointed connections with his sixth to The Cleaner in the Group II Dato Tan Chin Nam Stakes (1600m) at Moonee Valley.
However, returning to the Caulfield 1800m course, where the Peter Gelagotis-trained galloper won the Peter Young Stakes in February, prompted an improved performance.
Jockey Vlad Duric let Mourinho settle third until the home turn before he got the best out his mount in straight to get him home a short head in front of the $3.40 favourite Fawkner with the brave Tasmanian The Cleaner a nose away third, completing a trifecta of eight-year-olds.
"He just had the peach run and he came into the race when we pleased," Duric said.
"He nearly threw it away the bugger again when he running off the track but God bless him, he's a warrior and I wrote him off a bit today but I'm just really proud of him."
Mourinho's performance provided Moe trainer Peter Gelagotis with his first Group I win only weeks after he returned from a three-month suspension on a raceday treatment charge.
"We have competed and really put our horse out there and backed ourselves and backed our horse," Gelagotis said.
"Come raceday, he sticks the chest out, he grits the teeth and he says 'I'm here to do business' and he does the business.
"The horse has matured up nicely and he's been given every opportunity to fulfil his potential."
Kiwi galloper Mongolian Khan finished well in the last 150m to grab fourth ahead of fellow New Zealander Volkstok'n'Barrell.