Sports portraits carry two things at once: a face and a moment. The jersey, the number and the expression are usually what people actually want, and they are what make the piece specific.
A crest or a number in the composition also gives the eye somewhere to rest, which stops a single floating face from looking stranded on an arm.
Yes, and it usually improves the piece. It anchors the composition and it makes the tattoo about a specific moment rather than a generic face.
The face will not. Choose the moment you actually care about rather than the current season and it stays what it was.
About a hand span for a single face. Smaller and the likeness starts to depend on detail that will soften.
Yes, if the arm has the room. Two faces need to be planned together so one does not steal all the contrast.
Requests go straight to Federico, not to an agency inbox. He answers from his own address.