This is A.J. Burnett.
He was the opening day starter for the Pittsburgh Pirates.
This is a rosin bag.
Baseball pitchers use it to get better control of the ball.
Earlier today, A.J. Burnett went to use the Rosin bag, when...
The announcer pointed out that since it is April Fools' Day, this may be "the ol' exploding rosin bag trick."
Here's hoping it wasn't a prank, because if it was, I think whoever played it may be in grave danger. Does this look like someone you want to mess with?
