In the midst of an incredible campaign, San Antonio Spurs french center Victor Wembanyama has been diagnosed with deep vein thrombosis in his right shoulder, which will prematurely end his second year in the NBA.

According to Mayo Clinic, deep vein thrombosis occurs when a blood clot forms in a deep vein in the body, which can break loose and cause conditions including pulmonary embolisms or heart attacks, both of which are serious and life-threatening.

Wembanyama won NBA Rookie of the Year last year and was averaging 24.3 points, 11 rebounds and 3.8 blocks per game at the time of injury.