azgreg 228 yard avg in round 1 and 237 yard avg in round 2.
I did watch that replay. Pretty amazing. He did have two holes where he didn't hit driver that went 215 and 217 and the 18th where he hit it in the trees and it only went 190. Without those he was a bit over 240, with longs of 270,260 and 254.
edit to add: I see they only used two holes to measure driving distance. 5 and 15. 15 happens to be one of Mize's shortest drives at 215.