This is what the back says...
This ticket is revocable license and is subject to denial of admission upon refund of face value and subject to removal and revocation at the managements discretion.
Holder assumes all risk incidental to the game of baseball whether occurring prior to, or during, or after the game, including (but not exclusively) the danger of being injured by or in connection with any thrown bat or thrown or batted ball. Holder agrees that MLB, teams, players, and agents are not liable for any resulting injuries.
And the last paragraph is about not being able to tape games and that if you are taped while in attendance your likeness might be used form promotional purposes