Celtics coach Brad Stevens confirmed Saturday what was anticipated, that second-year forward Jaylen Brown has been diagnosed with a concussion after suffering a scary fall Thursday in Minnesota.

Brown went through his first series of concussion tests Friday and will not play Sunday against Indiana and could miss a few more games, according to Stevens.

This is the first concussion Brown has sustained in his short career.

Brown was injured after his hand slipped off the rim following a driving two-handed dunk. Brown landed on his upper back/shoulder area, but his head also made contact with the floor. Brown, who walked off the floor under his own power, is sore. He must pass a series of concussion tests and be cleared to return by an NBA-sponsored doctor before playing again.

“As far as structural, neck, back, he’s going to be fine,’’ Stevens said. “At some point it will be day-to-day, but I don’t see that happening in the next couple of days or a week. He has a concussion.’’

Brown sustained the injury on a pretty typical athletic dunk, but this time his hand slipped off the rim, causing him to fall with no support.

“I’ve only had it happen in my coaching career a handful of times,’’ Stevens said. “But every time it has, you just kind of [cringe]. He’s going full speed. He dunks with two hands. Again, he’s lucky and, at the same time, he’s going to be out for a little bit.’’

After Sunday’s game with the Pacers, the Celtics don’t play again until Wednesday against the Wizards, then they play in Orlando (Friday) and New Orleans (Sunday).

Gary Washburn can be reached at gwashburn@globe.com. Follow him on Twitter @GwashburnGlobe.