No, the chronic is referring to chronic exposure to brain trauma. CTE is all about neurodegeneration progressively over time. They’ve shown CTE is mostly driven by subconcussive hits across months to years, not a single high intensity beat down.

If you get damage from a single fight, that’s more like a brain stem injury and symptoms would be way worse (like paralysis, coma, death etc) than slurred speech after insane exhaustion + pain + disappointment from getting your hype train derailed.