He was one of three Otago regional councillors attending a council meeting this week to confirm their opposition to the council contributing funding to the stadium.
At the meeting, councillors were presented with a report reviewing the status of the conditions it set in place when it agreed to contribute $37.5 million to the stadium.
Corporate services director Wayne Scott said the council adopted the conditions in June last year.
By February, some had been met but, because the stadium had yet to be built, others had not.
The report recommended councillors pass three resolutions updating the conditions and outlining those still to be met.
A show of hands was asked for, indicating Crs Deaker, Bryan Scott and Gerry Eckhoff did not support the recommendations.
Cr Deaker said a roofed stadium was the most "unnecessary" project he had seen in 14 years of local government.
"Worse still, it is irrelevant to our purposes."
Cr Eckhoff said he could not accept the recommendations, when he had voted against the council's involvement in the stadium.
