CLEVELAND, Ohio -- Cleveland Cavaliers rookie Kevin Porter Jr. will undergo an MRI on his injured left knee Monday, league sources tell cleveland.com.

While the Cavs left Rocket Mortgage FieldHouse feeling hopeful about Porter’s prognosis late Sunday night, they weren’t willing to rule anything out until they see the scans. Monday will determine the severity and timeline.

“We’re bracing for some real time off,” a source said.

Porter was on crutches leaving the trainer’s room. His knee was not wrapped nor was it immobilized. A few teammates that checked on him during the game and popped in to talk with him shortly after the 118-103 loss to the Minnesota Timberwolves said Porter appeared to be in “good spirits.”

“He’s doing fine, as good as you can be with a potential knee injury,” John Henson said. “I don’t think it’s too serious personally, but you never know.”

When asked why Henson had that vibe, he smiled.

“Uh, I kind of went back there and looked at him,” Henson said. “His energy. He wasn’t crying or anything. I’ve seen it before. I think he’ll be alright.”

Henson was in on the play that led to Porter being injured, setting a screen for Porter before the youngster tried to make a spin move against Timberwolves swingman Robert Covington and fell down in a heap.

It appeared Covington made contact with Porter’s foot, which got caught underneath the teenager, causing his knee to buckle. In obvious pain, Porter immediately reached for his left knee and started screaming while teammates, coaches and trainers surrounded him near the 3-point line. After lying for a bit, Porter was helped to his feet and off the court by Tyler Cook and trainer Steve Spiro. Porter went straight to the locker room, unable to put much weight on his left leg.

“I just saw him go down, that was it,” Darius Garland said. “If anybody goes down with an injury I’m concerned. That’s how it is in the locker room. He’s in good spirits. That’s how KP is, he’s always in a good mood. He didn’t look any different.”

Porter started Sunday’s game in place of resting Kevin Love, as the Cavs shifted Cedi Osman to power forward. At the time of his injury, Porter had six points and five rebounds.

The Cavs were down by 17 points and mounted a furious second-half comeback that fell short. Porter’s replacement, Dante Exum, was at the center of that rally, finishing with a career-best 28 points and hitting all four of his 3-point tries.

Exum, whose career path has been altered significantly due to a variety of injuries, said he felt for Porter.

“I’ve been through my fair share of injuries so it breaks my heart seeing that," Exum said. "Hopefully he is going to be alright. I don’t know the diagnosis right now. Definitely going to be talking to him and making sure he’s doing the right things to get back on the floor.”

On the season, Porter, the 30th pick of the 2019 NBA Draft and the piece that the Cavs have been raving about for months, is averaging 8.5 points on 43.9% from the field and 29.7% from 3-point range to go with 3.3 rebounds and 1.9 assists. Since Jordan Clarkson’s departure, Porter has received an uptick in playing time.

He was recently nominated as Eastern Conference Rookie of the Month after averaging 11.5 points on 47.7% from the field and 37.3% from 3-point range to go with 3.6 rebounds and 2.2 assists in 14 December games.

“It kind of hurt my heart a little bit, especially young guys, this is the year for them,” Henson said. “Especially them just learning the game and he was progressing. At this stage of the season he was looking like the steal of the draft. Felt bad for him, but hopefully he’ll be OK.”

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