Sexton averaged 19.2 points as a freshman at Alabama and is an explosive runner, jumper, and defender.
The Cavs need a point guard with energy, and the 6-foot-3, 190-pounder will deliver just that.
The pick comes two years and two days after Irving hit the biggest shot in franchise history with a go-ahead 3-pointer in Game 7 of the 2016 NBA Finals, assuring the Cavs their first championship.
In an offseason that will be filled with plenty of unknowns, it seems as the Cavaliers aren't actively shopping the All-Star forward ahead of Thursday night's NBA Draft, according to ESPN's Dave McMenamin.
If James does not exercise his player option of $35.6 million on his contract next season by June 29, he becomes an unrestricted free agent on July 1.
The Cavaliers hold the eighth overall pick in Thursday's draft. While it starts with the draft, it is unclear how much the Cavs draft picks will impact James decision either way.
That year, the Cavs selected Andrew Wiggins with the No. 1 pick.
The Cavs' front office led by Altman entered the draft in the dark on James' plans.
Japan looking to maintain Asian presence at 2018 World Cup
Akira Nishino's call to change his Japan team nearly backfired as they progressed on fair play after a 1-0 defeat to Poland . Poland really didn't chase the ball down either as they had nothing to play for and were content with the scoreline.
One could argue that doing whatever possible to keep LeBron happy, and even slightly increase the chances of him staying in Cleveland, is good business.
"We continue to have good dialogue with his management team", Altman said.
Cavaliers General Manager Koby Altman said no matter what happens now, James had a remarkable and historical season and has "earned the right to approach his contracts the way he does". The Cavs scouted him throughout the season, and the day after they lost Game 4 in the Finals, Sexton worked out at the team's facility and owner Dan Gilbert referred to him as a "very intriguing draft prospect" on Twitter. "I think (Knox) is a guy who's really helped him in this pre-draft process".
At different points in the playoffs, all three players looked overmatched, but that's one of the great things about youth - there's always room to improve. But if I was him, I wouldn't be trying to get four, five and six because it ain't going to matter.
-Atlanta Hawks general manager Travis Schlenk admitted that his National Basketball Association draft strategy one night earlier was altered by a leaked media report during trade talks, leading to him backing out of a proposed trade with the Milwaukee Bucks.
Cleveland's draft decisions tonight will not only have a lasting influence on LeBron's future, but they will also have an immediate impact on the entire state of OH as well.
Ostensibly, this is what Altman and coach Tyronn Lue, who was at Sexton's presser and spoke to this idea, mean about turning toward player development.