A baseball with the yellow stitching in front of a black background.
Baseball / Softball

 

A yellow soccer ball is shown in this picture.
Soccer

 

A football with yellow stripes on it.
Football
A yellow volleyball is shown in this image.
Volleyball
A yellow ball is in the shape of a sun.
Golf

Tennis

A yellow stick figure holding something up to the sky.
Hammer Throw, Discus, Javelin, Track & Field

 

A pair of yellow hockey sticks and ball.
Lacrosse, Hockey, Field Hockey