Rusty Simmons of the San Francisco Chronicle reports:

Warriors, Don Nelson to reportedly part ways

Sources said Thursday that Warriors coach Don Nelson will be out by the opening of training camp Tuesday and will give way to assistant coach Keith Smart, who will be tasked with leading the transition to a new era under yet-to-be-approved owners Peter Guber and Joe Lacob.

Nelson, 70, who last season became the league’s all-time winningest coach, said just weeks before the Warriors’ summer-league games in July that he was reinvigorated and would coach the team in Las Vegas. But when the summer league opened, Nelson had already opted not to coach and didn’t even show up for practices.

His voice-mail greeting Thursday said it all: “Hi, this is Nellie. I’m busy, very busy, probably swimming with the dolphins.”

Nelson might be allowed to call the decision a resignation, but sources said he was interested in remaining with the team in some non-coaching capacity but instead was asked to leave altogether. ESPN reported that Nelson will receive the entire $6 million he is owed for the 2010-11 season. General manager Larry Riley did not return a message left on his cell phone.

Don Nelson Head Coach of the Golden State Warriors in action vs. the Sacramento Kings at Arco Arena in Sacramento, California. The Kings beat the Warriors 115-98 Photo via Newscom