Fields is still the best. He struck out all five guys he faced last night at Florida, including two with the bases loaded after he entered the game with one out in the 8th. He too has a 0.00 ERA, has pitched more innings, and has faced stiffer competition outside the conference (Arizona, Florida State, Oregon State, Clemson).
I know AW was hurt and is still putting up comparable numbers, but right now Josh Fields is having as impressive of a season as anyone in the country. You could probably say the same about his teammate Gordon Beckham. The other Bulldogs are having a helluva year so far.