He is not going to play LF. You don't put a kid in a position he has never played before professionally in a pennant race. He doesn't even have that much time at 3rd, but at least he's been playing infield.
If he comes up prior to September 1st, who do you jettison off the 25man roster to make room? Basically, the candidates are Shaw, Hill and I guess Hernandez (who I guess they could send down for a week).
Hill's not hitting, but I see some value in him as a defensive replacement for the stretch run. Shaw isn't going anywhere.
They just came off a 7-4 road trip folks. Have a decent homestand and bring the kid up on 9/1.