Coach: Our team has often been criticized for our enthusiasm in response to both our successes and our opponents’ failures.
Conclusion
Our team's behavior (enthusiastically celebrating our successes and our opponents' failures) is not unprofessional.
i.e. our team behaves professionally
Evidence
Some of the professionals in our sport are even more effusive in celebrating their success and taunting their opponents' failures.
Evaluate
This argument boils down do this Equivocation: because some Professional athletes do it, if we do it, we're acting Professionally
The argument is using two different senses of the word "professional / unprofessional".
The coach's players are being criticized for acting unprofessionally (immaturely, with poor standards of sportsmanship / decorum).
He defends the players' behavior by saying that it exists as well within the professional league (not amateur, paid to play).
We wouldn't say that Because these pro athletes are paid to play, they're by definition acting maturely, with good standards of sportsmanship and decorum.
Similarly, the author shouldn't be saying Because pro athletes are very effusive / expressive when they win, acting this way is very professional.
Goal
Find an answer calling out the famous Equivocation flaw, using two different meanings of "professional".