The two orientations used to study knuckle-ball effects. Also

When a baseball pitcher throws a knuckleball, the ball has no rotation and appears to flutter. What makes it flutter? - Quora

Why does a cricket ball swing or a baseball curve? - Quora

PDF) A comparison of Jabulani and Brazuca non-spin aerodynamics

PDF] The aerodynamics of the knuckleball pitch: An experimental investigation into the effects that the seam and slow rotation have on a baseball

Predicting a Baseball's Path

Effect of panel shape of soccer ball on its flight characteristics

PDF) A comparison of Jabulani and Brazuca non-spin aerodynamics

Explaining the aerodynamics behind Cristiano Ronaldo's free kick with Simcenter STAR-CCM+

Verlander's Grips, as shown during the game last night : r/baseball

How does a Knuckleball Work? The Science of the Knuckleball