Sioux Falls Skyforce (2014–2015)

After going undrafted in the 2014 NBA draft, Birch joined the Washington Wizards for the 2014 NBA Summer League. On September 14, 2014, he signed with his first NBA team, the Miami Heat.^[6] However, he was later waived by the Heat on October 25, 2014.^[7] On November 3, 2014, he was acquired by the Sioux Falls Skyforce, as an affiliate player.^[8] On February 4, 2015, he was named to the Futures All-Star team for the 2015 NBA D-League All-Star Game.^[9] In the 2014–15 NBA D-League season, he averaged 11.1 points per game, 9.5 rebounds per game, 1.2 assists per game, 1.8 blocks per game, and 0.7 steals per game, in 52 games played.^[10]

Uşak Sportif (2015–2016)

On June 30, 2015, Birch signed to play in Turkey, with Uşak Sportif of the Turkish Super League (BSL).^[11] The following month, he joined the Brooklyn Nets for the 2015 Orlando Summer League^[12] and the New Orleans Pelicans for the 2015 Las Vegas Summer League.^[13] He went on to play with Uşak during the 2015–16 season, and he averaged 27.0 minutes, 10.5 points, 9.1 rebounds, 0.5 assists, 1.3 blocks, and 0.5 steals per game, in 32 games played in the Turkish Super League 2015–16 season.^[14]

Olympiacos (2016–2017)

On June 14, 2016, Birch signed to play in Greece, on a 2-year €1.1 million net income contract,^[15] with the defending Greek Basket League champions, Olympiacos.^[16] With Olympiacos, he averaged 15.7 minutes, 5.7 points, 5.0 rebounds, 0.4 assists, 0.8 blocks, and 0.6 steals per game, in 33 games played in the Greek Basket League 2016–17 season.^[17] He also averaged 18.1 minutes, 7.3 points, 5.6 rebounds, 0.3 assists, 1.0 blocks, and 0.5 steals per game, in 37 games played in the EuroLeague 2016–17 season.^[18]

On July 10, 2017, Birch opted out of his contract with Olympiacos, in order to sign in the NBA.^[19]

Orlando Magic (2017–2021)

On July 27, 2017, Birch signed with the Orlando Magic.^[20]

On March 14, 2019, Birch recorded a double-double, tying his career-high with 13 points, 11 rebounds, one assist, and two steals in a 120–91 win against the Cleveland Cavaliers.^[21]

On July 10, 2019, Birch re-signed with the Magic on a 2-year contract.^[22]

On March 26, 2021, Birch had his best game of his career when he netted new career-highs with 14 points, 15 rebounds and four steals with four assists and two blocks in a 112–105 loss to the Portland Trail Blazers.^[23]

On April 8, 2021, Birch was waived by the Magic.^[24]

Toronto Raptors (2021–2023)

On April 10, 2021, Birch signed with the Toronto Raptors for the remainder of the 2020-21 season,^[25] making his debut the next day during a 102–96 loss to the New York Knicks, getting four points and five rebounds in 18 minutes of action.^[26] Three days later, Birch tied his career-high with 14 points, six rebounds, one assist, one steal and two blocks in a 117–112 win against the San Antonio Spurs.^[27] On April 26, he tied his career-high again with 14 points, six rebounds, one assist, two steals and two blocks in a 112–96 win against the Cleveland Cavaliers.^[28] The next day, Birch had his first double-double with the Raptors, getting 13 points and 14 rebounds, nine of which were offensive rebounds, in a 116–103 loss against the Brooklyn Nets. On April 29, he scored a career-high 20 points, making a career-high two three-pointers while adding nine rebounds, four assists, two steals and a block in a 121–111 loss to the Denver Nuggets.^[29]

On August 6, 2021, Birch re-signed with the Raptors for 3 years and just over $20 million, keeping him with the team through the 2023–24 season.^[30]

On February 9, 2023, Birch was traded, alongside a 2024 first-round pick and two future second-round picks, to the San Antonio Spurs in exchange for Jakob Poeltl.^[31] He did not appear in a single game for the team, and was waived prior to the start of the following season.^[32]

Bàsquet Girona (2024–present)

On February 5, 2024, Birch signed with Bàsquet Girona of the Spanish Liga ACB.^[33]

NBA

EuroLeague

College