So. Griff is a dumbass. And yes he is telling the truth when he just said both of his brothers are retired from Quidditch, now. That's right, no more Chudley peeps to harass. Greer quit at the end of the season. But only the team manager and his brothers knew this. Until now. So, yes. Feel free to have your character be astonished at Griff's mention of Greer's retirement, if your character would, in fact, be astonished at Greer's retirement.

Also, I would like to point out that I find it HILARIOUS that 9/15 of the pro-Quidditch players are Gryffindors. Just like the dumb jocks ought to be. :X