When Omni-Man and Invincible are playing catch, as mentioned the ball is traveling extremely fast, much faster than the speed of sound, yet they hear it coming, which would be impossible at supersonic speeds. Also, at that speed, the ball would not circle the Earth, but would break orbit and fly off into space.
When Omni-Man and Invincible are playing catch, they are throwing the ball around the world. It takes roughly 15 seconds for the ball to arrive, which would mean the ball was travelling at near light speed, which would make the ball and the gloves disintegrate.