I'm sure the info is out there, but I can't find his birth date. I saw a quote somewhere from Jax that indicated that he was held back when he came from North Carolina to PA, and was later held back due to the quarantine (I'm not sure if this was the pandemic; no clarification in the quote I saw). I can't speak to how accurate any of this is.
We can look at the Cadet rules, and know that he's under a certain again at whatever years he competed, but that just gives a general indicator of under X years old.