Adidas Jabulani
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The Jabulani was a football manufactured by Adidas. It was the official match ball for the 2010 FIFA World Cup.
Adidas Jabulani Official World Cup 2010
Carlos Alberto Parreira and Franz Beckenbauer presenting the 2010 FIFA World Cup semi-final match balls
The Adidas SpeedCell for the 2011 FIFA Women's World Cup
Lionel Messi and Sami Khedira disputing an Adidas Jabulani ball at the 2010 World Cup
Knuckleball
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A knuckleball or knuckler is a baseball pitch thrown to minimize the spin of the ball in flight, causing an erratic, unpredictable motion. While it is often incorrectly stated that the air flow over a
Adidas Jabulani
…NASA Ames Research Center studied its performance and compared it to the +Teamgeist Berlin (used in the 2006 World Cup) and found it had a noticeable "knuckleball" effect. Jabulani, meaning "be happy!" in Zulu, is the imperative plural form of the verb jabula "to be happy". Its design was much maligned by players…
Eddie Cicotte, who is sometimes credited with inventing the knuckleball
Tim Wakefield, a Boston Red Sox pitcher, in his throwing motion, showing his grip of the knuckleball