It is also the date of German center Daniel Theis signing with the team in 2017 for a two-year, $2.19 million deal.
Theis, who’d previously tried to play his way onto an NBA roster without success, joined the Celtics that fall, and quickly became a regular part of the rotation.
Apart from time missed for a torn meniscus the following March, the Salzgitter native has been an important part of the team since, averaging 6.7 points, 4.7 boards and 1.2 assists per game right up to the present.