San Antonio Spurs guard Stephon Castle is making the rounds on social media after streamer Jay Cinco alleged that his ex-girlfriend Bella left him for the reigning Rookie of the Year.In an emotionally charged social media post that was reposted on Instagram via Stream Cream TV on Wednesday, Cinco said:“A basketball player took my b****, I don't wanna fight that n**** no more. He got it.”"Jay Cinco opens up about his ex Bella leaving him for reigning NBA Rookie of the Year Stephon Castle 😭🏀💔" Stream Cream TV wrote in their caption. View this post on Instagram Instagram PostStephon Castle and his team haven't responded to the allegations. He is enjoying his first offseason as a professional player.Castle wasn’t on the Spurs’ Summer League roster but reportedly maintained a strong presence at the practice facility. He worked out consistently with the Summer League squad and took part in informal one-on-one games and workouts.Castle is being viewed as a key piece for San Antonio’s rebuilding project. Despite acquiring All-Star De’Aaron Fox and drafting Dylan Harper, there’s no thought of removing Castle from the starting lineup, and he is expected to retain a key role.Stephon Castle’s post on social media gets a reaction from fellow playersStephon Castle posted on his Instagram on June 19 details of his summer workout. The former UConn star was pictured at his college team’s practice facility.Fellow league players and some UConn players reacted to the post."Work ski!" Spurs guard Devin Vassell commented.Devin Vassell’s comment/Instagram @stephcastle"Tell em who won the matchup.." Huskies forward Jaylin Stewart commented.Jaylin Stewart’s comment/Instagram @stephcastle"Legend," Charlotte Hornets forward Liam McNeeley said.Liam McNeeley’s comment/Instagram @stephcastle"my brother,” Huskies guard Solo Ball replied.Solo Ball’s comment/Instagram @stephcastleStephon Castle was drafted fourth in the 2024 NBA draft by the Spurs. He came with a strong reputation, following a national championship at UConn.In his rookie season, he played 81 games, starting 47. He averaged 14.7 points, 4.1 assists and 3.7 rebounds per game. He also led all rookies in total points (1,190), made field goals, steals (74) and free throws made (249). Notably, he became the first Spurs rookie since Tim Duncan to finish in the team’s top two in both points and assists.Castle was named the NBA Rookie of the Year after receiving 92 out of 100 first-place votes. He became the fourth Rookie of the Year in Spurs history, joining David Robinson, Tim Duncan and Victor Wembanyama.