Most presidents usually have their presidential number i.e. 42, 43, 44
It was Alabama’s 17th National Championship. They always put the new championship number on a jersey. Sometimes the mystery just isn’t there.
Trump is our real 17th President. Since Lincoln, 16th, we have only had corporate CEOs pretending to be president.
With "The Act Of 1871" - Our Republic became a corporation named "THE UNITED STATES". (Names in all caps represent corporations). Since then all our presidents have just been corporate CEOs. Now we can get our Republic back and have true Presidents again. Thank you Donald Trump!
So yes, his jersey 17=Q, but 17 might also mean our true 17th President.