Why do cricketers spit on the ball?

Answer 1

Cricketers Spit on otherwise known as "shining" a cricket ball as they would like their fast bowlers to be able to swing the ball in later overs. They only shine on side and leave the other side "rough". When Bowling, the bowler will bowl with the seam (middle of a cricket ball) in an upright position and when the ball is delivered, the air will travel faster past the smooth, shined side of the ball and on the other side there will be drag and air will get caught on the rough side... this difference in wind speeds passing the ball results in ball "swining"- movinging in the air.