NBA star Jayson Tatum and NHL player Matthew Tkachuk, former classmates at Chaminade College Preparatory School in St. Louis, are both close to winning championships in their respective sports. Tatum's Boston Celtics lead the NBA Finals against the Dallas Mavericks, while Tkachuk's Florida Panthers are ahead in the Stanley Cup Finals against the Edmonton Oilers. Both athletes have expressed mutual support, with Tatum learning hockey rules to follow Tkachuk's games and Tkachuk cheering for the Celtics. Tatum and Tkachuk's success stories are celebrated by the St. Louis community, where they attended high school together. The Panthers and Celtics each need two more victories to secure their championships, highlighting a unique crossover of support between the NBA and NHL stars.