Yes, it can be trained. That is what media people are for. Back in my corporate days, I had to prepare for TV stations to shout questions about strikes, reductions in force, environment, plant closures, plant openings, etc. And you have to do it with a smile on your face and absolute command of facts.
Geoff does not present a good image, imo. He needs to ditch the hat (indoors!) and look and speak like an adult, not a 12 year old. And all he has to do is say, "Football is a game of movement and contact. Our goal is to execute each play as perfectly as possible. We didn't do that. For example ... <mention a play that went bad>. And here's how we will address that in practice. Next question."