After seven seasons of Bundesliga and EuroLeague basketball, Daniel Theis signed a two-year agreement with the Boston Celtics. He quickly impressed Celtic fans with his defensive grit and energy off the bench. The 25-year-old NBA rookie appeared in 63 contests for Boston, starting in two of them. Theis had 14 games in which he played 20 or more minutes. On October 24th, the fourth game of the season, Theis would deliver 11 points and five rebounds during a blowout win over the Knicks. Throughout the season, Theis' minutes would fluctuate based on coach Brad Stevens' mix and match approach towards facing various opponents. On February 23rd, a road win at Detroit, Theis would produce a career-high 19 points along with seven rebounds, two blocks and two steals. Unfortunately, on March 12th, Theis had season-ending surgery to repair a torn meniscus in his left knee. The Celtics would go on to finish the season at 55-27, losing to the Cavaliers in the Eastern Conference Finals.2018
Daniel Theis' second season in the NBA was similar to his first season. The 26-year-old German provided solid defense and rebounding off the bench, but injuries forced him to miss 16 games. His season stat line of 5.7 points, 3.4 rebounds, 0.6 blocks and 0.4 made threes from 14 minutes per game essentially echoed his rookie season. Theis continued to shoot well, providing 55 percent shooting from the field. The 6-foot-9 big man missed eight of Boston's first 15 games due to injuries to both feet. He'd return to provide solid back-up minutes at center and power forward for the Celtics. In a Dec. 8 blowout win at Chicago, Theis scored a career-high 22 points to go with 10 rebounds, five assists and four blocks. And while Theis' main role was to bang fellow big men inside, he did drain 26 three-pointers. Theis shot 39 percent from behind the arc, forcing defenders out of the key to defend him. Boston would finish the season at 49-33, sweeping the Pacers in the first round, but losing to the Bucks in the second round of the playoffs. Theis appeared in seven of Boston's nine playoff games, producing 1.7 points and 1.4 rebounds over six minutes per contest.
July 20, 2017Signed a two-year contract with the Boston Celtics.
July 16, 2019Signed, as a free agent, a two-year agreement with the Boston Celtics.