Just to clarify: an *appeal hearing* is not an opportunity to RETRY the entire case because you didn't like the ruling the judge in the lower court gave you.
An appeal hearing is where you appear before a panel and argue the judge in the other court reached a WRONG DECISION and the burden of proof is on you to cite *reasons* that show the judge made an incorrect decision.
This is often done using legal precedents and case law. If you can demonstrate to the appeals court the judge in your case DIDN'T apply legal precedents from other similar cases or that he/she ignored relevant case law, you have a good shot at getting a reversal.
Here's what still stuns me about the NFL's appeal hearing scheduled for Oct 2: I haven't seen ANYTHING that demonstrates they are going to appeal to some legal precedent that Judge Mazzant ignored or case law that he refused to apply to his ruling.
Going into the appeals court to try to re-argue the case *without* being able to cite any real concrete procedural errors or case law mistake made by the judge in the lower court can end up getting you on the end of some brutal questioning by an appeals panel that thinks you're wasting it's time.
If transcripts of this hearing come out, I'd look for question from the judges on the panel pointedly asking the NFL's lawyers what *specific* procedural errors they think Judge Mazzant committed, or what *specific* case law do they think Mazzant ignored or discounted in reaching his decision.
The NFL's lawyers had better have some good answers ready, because if not, this hearing could get ugly quickly.