During his senior year, he consistently averaged 7.3 points, 6.6 rebounds, and 1.7 blocks per game over 23.8 minutes, demonstrating exceptional efficiency with 61.4 percent from the field and 42.9 percent from three-point range. Post-draft, Alexander joined the Miami Heat for the 2019 NBA Summer League before securing a training camp contract on July 15, 2019. His professional ascent continued with a two-way contract with the Miami Heat on January 15, 2020, leading to his NBA debut on August 6, 2020, where he recorded one rebound against the Milwaukee Bucks. He contributed to the Heat’s impressive run to the 2020 NBA Finals.
Following his NBA tenure, Alexander made a significant impact in international leagues, commencing with Fuenlabrada in Spain from 2020 to 2022. He returned to play for the Scarborough Shooting Stars in Canada in 2022 before joining Valencia in Spain from 2022 to 2023. His consistent performance led to a move to Hapoel Tel Aviv in Israel, where he played from 2023 to 2024. Alexanders prowess on the court was further recognized through his contributions to the Canadian National Team, earning a bronze medal at the 2023 FIBA World Cup.
Most recently, Alexander signed with Türk Telekom in Turkey in July 2024, a testament to his sustained high-level play. This commitment is underscored by an anticipated contract renewal slated for September 2025, solidifying his future with the team. A prominent force defensively, Alexander is projected to be the EuroCup blocks leader for the 2025 season, highlighting his continued elite performance as a center. His career trajectory demonstrates a consistent ability to adapt and excel across diverse, competitive basketball environments, making him a highly sought-after talent in global professional basketball.