OAKLAND, Calif. — Warriors coach Steve Kerr said he is going to be less revealing about Kevin Durant’s workout progress, as speculation has grown the Golden State star may not return at all, especially with the Raptors taking a 3-1 series lead in the NBA Finals.

Kerr said he would not say whether or not Durant had been cleared for a contact scrimmage Friday before the Warriors lost Game 4, 105-92. The media was informed it could not enter the bowl of Oracle Arena from 3-3:30 p.m. local time Friday. That raised speculation Durant was going through his first contact scrimmage.

There are two days off between Games 4 and 5, so Durant could scrimmage either Saturday or Sunday. The Warriors are using Saturday as a travel day to fly to Toronto. Durant has been out for more than a month with a partially torn right calf muscle.

“We’re hoping [Durant] can play Game 5 or 6,’’ Kerr said. “And everything in between I’ve decided I’m not sharing because it’s just gone haywire. There’s so much going on, and so it doesn’t make sense to continue to talk about it. He’s either going to play or he’s not.”

The Warriors, down 3-1 in the series, face elimination Monday in Toronto. Hence, it is conceivable the Warriors, who are moving to San Francisco next season, have played their final game at Oracle Arena.

In a rather stunning development, valuable big man Kevon Looney, once ruled out for the series with a broken collarbone, got a second opinion and played in Game 4, scoring 10 points and grabbing six rebounds in 20 gritty minutes. The only blemish was his two missed free throws late in the fourth quarter.

He missed just one game with the injury. That second opinion determined Looney couldn’t injure himself further.

“We made sure that there’s no long-term risk involved with him playing,’’ Kerr said. “And it all checked out, and he’s dying to play, and so we’ll give him a shot and we’ll see what he’s got. He’s tough.”

Raptors coach Nick Nurse entered Friday two wins from an NBA title, but his rookie success still seemed underappreciated.

Stephen Curry and several Warriors mocked Nurse’s box-and-one defense that slowed down Golden State in the final five minutes of Game 2, but the coach let it roll off his back.

“Listen, I don’t really care,’’ Nurse said. “I don’t really give a crap, is my line. Like, I mean, if things work, I don’t care if I go out there and four guys stand on their head and we get a stop, right? And it was very effective. The only basket they got against it was a 3-pointer by [Andre] Iguodala with eight seconds to go or something like that.’’

The Warriors’ PR staff was awarded top prize for media relations for the fifth time in six years by the Basketball Writers Association. Only Toronto’s staff interrupted its run.