Had you just said "English", you could have gotten away with the other definitions(raw recruit, a novice)......but you specifically said "NFL football English". In NFL football terminology(and every sport) a rookie is an athlete playing in their first season. By dictionary definition, EJ is not a rookie.
I reiterate that I have no problem whatsoever with your argument. EJ didn't play a full rookie season, therefore that should be factored into ones analysis when determining his progress etc, etc.
I merely had a problem with you saying(in a superior manner) that you had "a full command of the English dictionary" and then directly followed that up with "...EJ is a Rookie....in NFL football English".
For somebody who avows to have a full command of the English dictionary, it is ironic that you cannot understand that you made a simple error in regards to the definition that you used.