If there is a game at the dodger stadium at 7:10 p.m., and they are giving out free stuff to the first 50,000 fans, what time do you suggest i'de get there to get a free prize?

Seriously, the first 50,000? What kind of attendance are they raking in each night? Or are the Giants coming to town or something? Dang, that's a huge promotion. I used to have season tickets, and if it's a popular promotion, get there an hour before the gates open.

About the third or fourth inning.

The total capacity at Dodger Stadium is 56,000, but it's alwyas a late arriving and early leaving crowd. If you get there in time for the first pitch, you'll have no problems.

well that depends. you have to take into consideration what kind of a game you're seeing. depends on how many people show up. if it's a division rivalry, the earlier the better, because there's gonna be more people.
first 50,000? That sounds like an all-fan giveaway to me. Dodger Stadium can't be bigger than 48,000. unless you meant the first 5,000.
also, check to see when the doors open.
here in Minnesota, if there's a giveaway for the first 50,000, most people streaming through the turnstiles will get two or three of the giveaways...lol. 50,000 - for a Twins game - at the Metrodome? Get real...lol.