Source: Celtics set to add free-agent guard Shane Larkin

ByCHRIS FORSBERG
July 20, 2017, 5:35 PM

— -- The Boston Celtics will continue a feverish offseason roster overhaul by signing free-agent point guard Shane Larkin, according to a league source.

Larkin, the No. 18 pick in the 2013 NBA draft, played 72 games with Saski Baskonia in Spain last season and averaged 13.8 points, 2.9 rebounds and 5.4 assists per contest. He elected to pass up a $6.3 million option to compete for a spot on a Boston roster that now features 16 guaranteed contracts.

Larkin last played in the NBA with the Brooklyn Nets during the 2015-16 season. The Celtics, who have already formally signed nine players this summer, including All-Star Gordon Hayward and seven players on rookie deals, have revamped the roster of a 53-win team that advanced to the Eastern Conference finals last season.

Boston made official Thursday the signings of 2016 first-round pick Guerschon Yabusele and German import Daniel Theis. Boston's other summer signings include veteran Aron Baynes and rookies Jayson Tatum, Ante Zizic, Abdel Nader?and Semi Ojeleye. Rookie Kadeem Allen was signed to one of two available two-way G League contracts.

The Celtics also received Marcus Morris in the trade that sent Avery Bradley to Detroit in a cap-clearing move necessary to sign Hayward.

Boston's roster features just five returning players in Isaiah Thomas, Al Horford, Jae Crowder, Marcus Smart?and Jaylen Brown.

The Celtics also signed Paul Pierce earlier this week so he could retire as a member of the team.

Larkin's signing was first reported by David Pick.

ESPN's Nick Silva contributed to this report.