Yes, they say you have to go in immediately after purchase but they don't hold you to that - they are rather strict about the 1 ticket per person max. Those seats sell out early also so it helps if you can have someone snag them well in advance. The better more trickery of a tip is Standing Room Only seats for 10 bucks. Those are only available at box office BY DIRECT REQUEST.

If you say you want the cheapest ticket available they will not include the standing room tickets ($10 per ticket). Usually, they only sell SRO when the game is mostly sold out when all that are left are $100+ seats... but they sometimes will sell them even on non-high demand games. I suggest you just ask nice and do it as close to first pitch as possible.

With SRO tickets you can enjoy the game just fine from areas like the batters eye box, scoreboard area, left field standing area, red porch, etc. They also don't always check ticket stubs times under the scoreboard section (miller lite seats) and it's generally easy to grab a spot there as well as left field.

I have bought SRO for probably 20 games when I need extras or don't have my season seats. It's great and avoids dealing with the scalpers, especially that prick with the leather fanny pack. EDIT: Wording