I had a player drop 2 GS in one week this past season. That was a 34-year-old who played 147 minutes that week (heavy minutes in two OT games, one of those games going to 3OT). 76 points and 41 rebounds in one week, not bad for an old guy.
Don't ask what sort of Chunks they are, you probably don't want to know. Blowing Chunks since Season 4!