LOS ANGELES — Lebron James made the tying layup with 0.8 seconds left in regulation before scoring four of his 22 points in overtime, and the Lakers surged to a 3-1 lead in their first-round playoff series with a 117-111 victory over the Memphis Grizzlies on Monday night.

The 38-year-old James also grabbed a career playoff-high 20 rebounds for the first 20-20 game of his 20-year career. The top scorer in NBA history added seven assists and two blocked shots while committing just one turnover in his record 270th playoff game.

“I just try to be as great as I can be offensively, but more importantly on the defensive end,” James said. “That was the mindset tonight. I was able to make a couple of plays. ... My teammates told me I had 20 and 20. It’s the first time I’ve done it in my career, so that’s pretty cool, I guess.”

ustin Reaves scored 23 points and Anthony Davis had five of his 12 in overtime for the seventh-seeded Lakers, who won two straight home games to move one win shy of their first playoff series victory outside the Florida bubble since 2012.

“He just took over down the stretch,” Davis said of James. “Got us a bucket to get to overtime. ... All our guys, it was a good team effort. This team is not going to go away.”

Los Angeles surged back from a seven-point deficit with five minutes left in regulation with a rally that abruptly began when D’Angelo Russell hit three consecutive 3-pointers, and the Lakers never trailed in OT.

“I’m so proud of our guys, the way we fought,” Lakers coach Darvin Ham said. “We found a way.”

Game 5 is Wednesday night in Memphis.