http://sandiego.padres.mlb.com/ticke...c_id=sd&y=2013


Go down the list and choose your game, click "Buy Tickets", on the next page and enter code: ROCK in box on top left that says "Enter Offer Code/Password". If code is still valid you will get a box that says:

"Offer code accepted!
Rock N Roll Marathon Free Ticket Offer
Rock N Roll Marathon Ticket Offer
(Offer may not apply to all seats.)"

Click on "Show offers on Map" and continue with your free purchase.