If you're curious, I think the likely Game 5 crew chief is James Capers. There are 7 chiefs working in this round (Foster, Mauer, McCutchen, Crawford, Callahan, Capers, Davis). 5 of those have already worked this series and aren't likely to be in a Game 5, leaving only Mike Callahan and James Capers as crew chiefs who haven't worked in this series. Callahan is working tonight in Portland, so process of elimination says Capers. It could be someone else, but to get there, the league would either have to dramatically shake up its usual methods of assigning crew chiefs to playoff series or pick a brand new crew chief for these playoffs late in Round 2; each of those things seems unlikely.
Harder to guess the crew, but it seems most likely to come from a pool of the following candidates: Pat Fraher, Ron Garretson, John Goble, Jason Phillips, and Sean Wright. If I had to guess, I'd posit that Goble is one of them, since he's worked a couple of games in these playoffs on Capers' crew (including Game 4 of Spurs/Grizzlies). Again, there are a few other options, but to get to those, the league would either have to change up its usual methods of assignment or put a very inexperienced official (like Bennie Adams with 2 career games past the first round, Kane Fitzgerald (1), Courtney Kirkland (1), Josh Tiven (2)) on a very high stakes game, which would be unusual.