Ben Simmons ranks No. 1 on ESPN's Big Board for the 2016 NBA Draft.

"Anyone that doesn't have Simmons No. 1 [on their draft board] should be fired," one longtime GM with a great draft track record told ESPN on Monday.

Fifty-one NBA scouts and execs attended Simmons' game in Brooklyn on Monday in which he had 21 points, 20 rebounds and seven assists.

"You don't find players his size, with his elite athletic ability that see the game the way he sees the game," one GM said. "He's unselfish to a fault. He's always trying to make the right play. And he's just scratching the surface. Look at how the other freshmen are faring right now. It takes a while to adjust. What does his box score start looking like when he adjusts?"

The main concern with Simmons is his jumper and whether that may make a team pass on him at No. 1 was asked.

"Not a chance," one GM said. "He does everything else well. He's not a bad shooter. It won't stop anyone from taking him No. 1."

Skal Labissiere, Dragan Bender and Jaylen Brown could all compete for the No. 1 spot.

"Towns, Mudiay and Porzingis were always in the mix last year," one GM said. "There was plenty of debate. There just isn't any real debate with my scouts about Simmons right now. He's way ahead of those guys. He's going to have to struggle and those guys are going to have to get a lot better."

Labissiere has ranked No. 1 on the Draft Express' Big Board since last April.

Kentucky has received a commitment from Malik Monk, who was ranked No. 5 by ESPN.

Monk, a native of Bentonville, Arkansas, had been the focus of a long recruiting battle between Kentucky and the in-state Razorbacks.

"This has been the toughest decision I have made in my life," Monk said in the statement. "With so many great coaches and historical programs recruiting me, it has really been a tough but fun process."

Monk is a 6'3 shooting guard and an electrifying athlete.

Harry Giles has committed to Duke, picking the Blue Devils over Kentucky, Kansas and Wake Forest.

Giles suffered a partially torn right ACL this week and had previously torn the ACL in his left knee.

Giles is rated as the No. 1 recruit in the 2016 class by ESPN.

Giles will have the chance to play with Jayson Tatum, who is ESPN's No. 2 recruit.

"We were roommates in USA Basketball this past season," Tatum told ESPN. "When you spend over 30 days together, you either grow closer or apart. We got closer."

Jeff Capel was key in the recruitment of Giles.

"Jeff built a great relationship with Harry and that was key," Oak Hill assistant coach Cory Alexander said.

Harry Giles has suffered a partially torn ACL in his right knee and will miss the remainder of the 15-16 high school season.

Giles is considered the top recruit of the 2016 incoming freshman class.

Giles Jr., said his son still plans to announce his decision on what school he'll attend, on Friday from Oak Hill Academy (Virginia).

The four schools still involved with Giles' recruitment are Duke, Kentucky, Kansas and Wake Forest.