Nobody is working harder, or longer, than the Oklahoma City Thunder and Memphis Grizzlies right now.

These small-market teams have gone blue collar with three consecutive overtime games in their first-round Western Conference series. The rest of the NBA? Well, there were three games combined in the other series that have gone past regulation through Saturday.

“Three overtimes in a row,” Thunder guard Russell Westbrook said early Sunday morning. “I don’t know when the last time that happened. To come out with the victory is a relief, and it’s a great feeling.”

This is only the second NBA series since the 1952 postseason to feature three consecutive overtime games, and the first since Boston and Chicago in 2009, according to STATS LLC.

The Thunder finally got their first win Saturday night 92-89 in Game 4 thanks to Reggie Jackson’s personal playoff-best performance, and now this is a best-of-three series that looks to go the limit. Game 5 is Tuesday night.

BOBCATS OFFENSE — Coach Steve Clifford says if the Charlotte Bobcats hope to avoid a first-round sweep by the Miami Heat they’re going to need someone other than Al Jefferson and Kemba Walker to come through on offense.

The Heat double-teamed Jefferson after he scored 15 points in the first quarter Saturday night and hounded Walker en route to a 98-85 victory in Game 3.

Game 4 is tonight in Charlotte.

Clifford says “they were very aggressive sending a second defender at Al and much more aggressive with Kemba. That means there are other opportunities with other guys and we have to take advantage of that.”

While Jefferson and Walker were 12 of 20 from the field, the rest of the Bobcats shot just 33 percent in Game 3.

KERR UPDATE — Steve Kerr says he spoke with Phil Jackson twice over the weekend and that they will continue discussing his potential of becoming coach of the New York Knicks.

Kerr says he had dinner with Jackson, his former coach and the new Knicks team president, Friday night and they talked again Saturday. Kerr was in New York to work Sunday night’s game between the Brooklyn Nets and Toronto Raptors for TNT.

He has been mentioned as a candidate for the job since Jackson was hired in March. Kerr said he has wanted to coach for a few years and would be “crazy” not to look at this option.