McCollum is passing on the FIBA World Cup to concentrate on the upcoming NBA season, according to a report.
Greg Monroe, Pau Gasol, Kenneth Faried and Kosta Koufos, among others, are some of the veterans at the position who remain unsigned.
Some players have surpassed expectations in July while others have fallen by the wayside.
Curry returns to Dallas after one season with the Trail Blazers.
The four-year deal will begin in 2021-22 and includes a player option in the final year.
Portland Trail Blazers center Enes Kanter described Zion Williamson as "Julius Randle with hops".
Bazemore averaged 11.6 points and 3.9 rebounds in 67 games for Atlanta last season.
Here are the best and worst picks from the first round of Thursday's NBA Draft.
Little, who spent just one year at North Carolina, was projected as a top-15 pick in this year's draft.
Terry Stotts has landed a new deal after leading the Trail Blazers to their first Conference Finals appearance since the 1999-00 season.