Throughout the years we have learned that wet or humid weather can impede the knuckleballer from getting a good grip on the baseball. After he releases the baseball, there are numerous theories on how atmospheric conditions affect the flight and movement of this flutter ball. There have been opinions on pitching in Domes versus outdoors, cold weather vs warm weather, and wind blowing in vs. wind blowing out. It is why I really don't like having to depend on them. They have a million excuses ready to go.