The Celtics have offered an invitation to training camp to guard Dan Dickau, according to agent Mark Bartelstein, the Boston Globe reports.
Dickau, 31, played five games for the Brose Baskets in Germany last season, averaging 17.6 points per game.
In six seasons in the NBA, Dickau has averaged 5.8 points per game for the Atlanta, Portland, New Orleans, Dallas, Boston and Los Angeles Clippers.
Dickau last played for the Celtics during the 2005-6 season, but tore his Achilles' tendon and was eventually traded to Portland.