The Boston Celtics are bringing aboard a young former first-round draft pick to get some seasoning with their G League affiliate, the Maine Celtics.

Per Michael Scotto, Maine is signing free agent former Brooklyn Nets guard Keon Johnson.

Keon Johnson has been claimed by the Boston Celtics’ G League affiliate, the Maine Celtics, sources told @hoopshype. Johnson is now fully healthy. He averaged 10.6 points, 3.8 rebounds, 2.2 assists and 1.0 steals in 79 games, including 56 starts, for the Brooklyn Nets last season pic.twitter.com/XzwyVmvoh6

— Michael Scotto (@MikeAScotto) November 30, 2025

This story will be updated…