Nola was off, it was subtle, but his command was a little shaky, his changeup wasn't effective, and he struggled to get through 6.
Of course, this is relative to the way Nola's been pitching for the last month or so, for any other starter it would be fine.
Williams better learn how to hit offspeed stuff quick, they threw him one FB in the zone, he singled, that may be the last FB strike he sees for a while, because he was looking bad on curves and changeups.