1. I was working on my knuckleball. It needed more work.

2. "He's sort of like a knuckleball pitcher, " Yankees Manager Joe Torre said.

3. Shifting an Internet friendship into the real world trickier a knuckleball.

4. And since they're placed irregularly on an oblong shape, one researcher compared tracking the comet to trying to hit a knuckleball.

5. Demographic forces are decidedly in favor of soccer's eventual success in the land of the forward pass and the knuckleball.

6. Shifting an Internet friendship into the real world can be trickier than hitting a knuckleball.

7. While the Teamgeist ball was great for strikers, many goal keepers complained that the ball's aerodynamics created a lack of rotation in the air, making its path at times erratic, like a knuckleball.