which of these sports projectiles has been recorded traveling the fastest?

 The fastest recorded sports projectile is the golf ball.  Golf balls can reach incredibly high speeds when hit by professional golfers using special clubs.  The exact speed varies depending on factors such as the golfer's swing speed, club selection and weather conditions.  However, the fastest recorded golf ball speed is approximately 211 mph (339 kph).  It is worth noting that this speed was achieved under controlled conditions specifically designed to break records and may not represent the normal speed of a golf ball during regular play.