The Oklahoma City Thunder have joined the Philadelphia 76ers in opposing the NBA's proposed changes to the draft lottery system, according to a report from Yahoo's Adrian Wojnarowski.

Chris Mannix of Sports Illustrated reports that the Milwaukee Bucks will also oppose the proposal.

Sam Presti has attempted to warn other small-market executives that changing the system is a risky proposition for their franchises.

Uner the proposed new system, the worst four teams have a 12 percent chance at the first pick, No. 5 has an 11.5 percent chance, No. 6, 10 percent, and on down.

The changes have been triggered by a response to the 76ers' pursuit of high draft picks in successive seasons.

Presti's belief is that the changes would give big market teams another advantage.

"Everyone is too focused on Philly, on one team in one situation," said one sympathetic GM. "The only chance for a lot of teams to ever get a transformational player is through the draft, and eventually we are all going to be in the lottery, in that spot. The teams that'll drop from two to eight, or three to nine – that's just going to take the air out of those fan bases and franchises. They'll get little, if any chance, to improve.

"We are going to see more big-market teams who just missed the playoffs jump up and get a great young player at the top of the draft. And people are going to go "What the [expletive] just happened?"

The 76ers and Thunder need six more teams to join them in opposing the rule change before Wednesday's vote.

As one Western Conference GM said, "Then there will be no going back. I hope we know what we're doing with this one."