Jason Silver anchors the American street basketball team Jabberwock as its center, towering at 210 centimeters and weighing 115 kilograms—the series' tallest and heaviest player. His imposing physique features silver hair, multiple ear and lower-lip piercings, and dense musculature. He dons jersey number 8 in games, while off-court attire includes a black hoodie, white v-neck shirt, layered necklaces, and baggy pants. Arrogant and self-absorbed, Silver routinely calls himself the "Almighty Me" and exhibits lecherous tendencies toward women. He ignores others unless commanded by team captain Nash Gold Jr., obeying Nash unquestioningly. Teammates brand him a "beast" for his volatile conduct. Silver mocks perceived weakness and erupts in fury when challenged, refusing to acknowledge any superior. Under pressure, his mental instability triggers recklessness. He scorns practice, relying solely on innate talent. His personal motto is "I have never thought," his favorite food steak, and his non-basketball specialty fisticuffs. Upon Jabberwock's arrival in Japan, Silver makes inappropriate advances toward a female interviewer at the airport. In a preliminary match against Strky, he participates in mocking tactics that secure an 86-6 rout. Jabberwock's ensuing insults about Japanese basketball provoke a revenge match against Vorpal Swords, featuring the Generation of Miracles, Kuroko Tetsuya, and Kagami Taiga. Silver's basketball prowess stems from a "body chosen by God himself," granting extraordinary physical gifts despite zero training. He surpasses Murasakibara Atsushi in raw strength, outpaces Aomine Daiki in speed, and out-jumps Kagami Taiga. Notable feats include a two-handed windmill dunk from the free-throw line—unattainable for Kagami—and outrunning fast breaks by Midorima Shintarō and Kise Ryōta. His "Animal Instinct," likened to a Tyrannosaurus Rex rather than a feline, sharpens reflexes, senses, and physicality, enabling him to counter Kuroko's misdirection passes. Against Vorpal Swords, Silver initially overpowers Murasakibara using his physical edge. When Murasakibara unlocks full strength and gains dominance, Silver retaliates with a deliberate, bone-breaking foul. This malice ignites Vorpal Swords' rage, pushing Kagami Taiga into the Zone. Silver's frustration peaks as Kagami surpasses him in strength and leaping ability. Containing him demands combined efforts from Zone-empowered Kise Ryōta (using Perfect Copy) and Aomine Daiki. After Vorpal Swords wins, Silver demands a rematch until Nash Gold Jr. silences him. Inspired by LeBron James' size and athleticism, Silver's unique wildness draws a non-feline animal comparison. He displays relentless stamina without visible fatigue, though his performance plummets when emotionally destabilized by unforeseen challenges.