A former NBA lottery pick will compete for a Celtics roster spot this preseason.

Third-year guard Devin Carter on Monday signed a training camp tryout contract with Boston, according to multiple reports.

HoopsHype’s Michael Scotto was the first to report Carter’s signing. MassLive’s Brian Robb reported that his deal is an Exhibit 10, a non-guaranteed contract that will allow Carter to receive a bonus if he is released and joins Boston’s G League team.

Drafted 13th overall out of Providence College in 2024, Carter appeared in 74 games with 12 starts over two seasons with the Sacramento Kings. During the 2025-26 campaign, he averaged 18.4 minutes, 8.9 points, 3.3 rebounds and 2.7 assists per game, shooting 41.4% from the field and 26.3% from 3-point range.

Sacramento traded Carter to Atlanta in June, and the Hawks waived him last Friday. He’ll be one of at least three tryout players in camp with the Celtics, as undrafted rookies Milos Uzan and Tucker DeVries also signed E-10 contracts with the team this offseason.

Carter and Uzan, a Houston product, both are point guards. They’ll look to earn roles as depth options in a backcourt led by Derrick White, Payton Pritchard and veteran newcomer Mike Conley.

Last season, wing Ron Harper Jr. entered Celtics training camp on an Exhibit 10 and successfully parlayed it into a two-way contract.

Born in Miami, Carter has multiple New England ties, having played two seasons at Providence and one at Brewster Academy in New Hampshire.

As a junior with the Friars in 2023-24, he was the Big East’s Player of the Year and leading scorer (19.7 points per game). He also ranked third in the conference in rebounds per game (8.7) and fifth in steals per game (1.8), and shot 37.7% from 3-point range.

Carter has been far less productive and efficient at the NBA level, where he is a career 27.4% 3-point shooter.

As of Monday, the Celtics had one open 15-man roster spot and one open two-way slot, with second-year center Amari Williams and rookie wing Dillon Mitchell filling the other two.