Police officers were called after the 27-year-old North Melbourne footballer fell from the bridge last night.
Hooker fell to a third round loss to Edson Barboza in Milwaukee, taking a barrage of blows in the process.
The former WBO champion returned to the winner's circle with a third round knockout over the Mexican-American in Christchurch last night.
The 18-year-old has only played rugby for a few years but is touted for big things.
"We have been doing a few things differently and we have seen benefits from it in camp and in sparring."
The Mexican-American boxer said at today's press conference that he loves NZ coffee and has about 2-3 hot cups a day.