NEW YORK - Markelle Fultz is expected to be the No 1 pick in Thursday's NBA Draft after the Philadelphia 76ers swung a deal for the top choice after watching his private workout.

The 19-year-old point guard, who played at the University of Washington last season, would become the club's fourth top overall pick and follow 2016's first overall pick by Philly, Australian forward Ben Simmons.

Bryan Colangelo, the team's president of basketball operations, played coy about the pick even after swapping the first and third picks with Boston and giving up a future No 1 pick to get the first choice of unclaimed talent.

"I feel that within the top 10, there are probably five or six sure-fire All-Stars. There may be one or two franchise-level players," Colangelo said on Tuesday.

"On Thursday night, hopefully we make a decision that results in one of those franchise-level players joining the 76ers."

Fultz averaged 23.2 points, 5.9 assists, 5.7 rebounds and 1.6 steals over 25 games last season for a Washington Huskies team that was 9-22.

He would join a young squad that features Simmons, who missed all of last season with a foot injury, Jahlil Okafor and 2017 NBA Rookie of the Year finalists Joel Embiid and Dario Saric.

That young core of talent could provide a base to rebuild the team.

Since 2003, the 76ers have won only one playoff series and have only one winning season since 2005. They were 28-54 last season.

"We have a core of young players that will be significantly stronger once the draft selection is made," Colangelo said.

"We felt like we were in the right position to make a deal. We felt the value of adding the one pick now was the right thing at the expense of only losing one of four going forward."

Croatian forward Saric was asked on Twitter about the young group melding into a championship team and replied: "It will be hard but I hope we get a big chance to be dominant."

The Los Angeles Lakers have second pick in the draft and are expected to select UCLA standout Lonzo Ball.

The 19-year-old point guard had 14.6 points, 7.6 assists, 6.0 rebounds and 1.8 steals a game for the Bruins last season. No other US college player averaged 14 points with six rebounds.

Boston comes back at third overall with point guard Isaiah Thomas solidly in place, making Fultz expendable and opening the door for other talented playmakers as Josh Jackson, a shooting guard who scored 16.3 points, 7.4 rebounds 3.0 assists and 1.7 steals a game for Kansas last season.

De'Aaron Fox, a point guard who scored 39 points against Ball-led UCLA in the national college tournament, is also among the top prospects.

The Phoenix Suns will select fourth, followed in order by the Sacramento Kings, Orlando Magic, Minnesota Timberwolves, New York Knicks, Dallas Mavericks and Sacramento again.

Agence France-Presse