Overland Park ? A campaign to raise Johnson County’s property taxes to finance a youth soccer complex drew $1.3 million in cash and other donations from the Kansas City Wizards and other pro-soccer interests, according to new finance reports.

But despite a huge mismatch with opponents, who raised just $18,000, the proposal was defeated in November’s election by 64 percent to 36 percent.

The Wizards, who play Major League Soccer games at Kansas City’s Arrowhead Stadium, had kept a low profile during a campaign season that saw commercials for the Johnson County youth soccer complex airing nonstop on area TV stations.

But opponents of the property tax contended the Wizards were promoting the complex hoping it would boost the team’s chances for partial public financing of a major league stadium in Johnson County.

“We were sure they were doing it; we just could not prove they were doing it,” said Wayne Flaherty, a leading opponent of the tax increase.

“They must have thought if they admitted that they were the ones spending all the money, it would go against them.”

The finance reports show the Wizards’ ownership group, OnGoal LLC, contributing more than $800,000 to the campaign, including $380,000 in cash and $434,301 in in-kind donations.

Price Brothers Management, which would have sold the 300-acre Overland Park site to Johnson County for the 24-field complex, contributed $455,000 in cash and in-kind donations, the reports show. The company would have received about $16.8 million from the sale of the land.

Before the Nov. 7 election, supporters of the soccer initiative declined to reveal what role the Wizards played in the campaign, saying financial information didn’t have to be disclosed until the end of the year.

Late Tuesday, OnGoal released a statement explaining its interest in the campaign.

“OnGoal’s investment in the ‘Yes on Soccer’ campaign demonstrated the commitment to the development of soccer at all levels in the Kansas City metropolitan area,” the statement read.

“This belief in the Kansas City soccer community will result in OnGoal’s continued investment in the sport in many capacities. One example of this commitment will be the upcoming announcement of a state-of-the-art training center in Kansas City, Missouri.”

The campaign finance reports did not detail what kinds of goods and services were donated. The campaign’s treasurer, Randy Downing, said he didn’t know what specific in-kind contributions were made.

The pro-soccer campaign had support from the business community, including established law, engineering and architecture firms.

The Greater Kansas City Chamber of Commerce contributed $2,000 and the Greater Kansas City Sports Commission put in $500.

The self-described grass-roots campaign also garnered a lot of support from engineering and architectural companies and heavy contractors in Kansas City.

The heavy-contractors group kicked in $25,000, Henderson Engineers of Lenexa contributed $25,000 and 360 Architecture of Kansas City put in $15,000, reports show.