I don't know if all the teams are doing it now, but when you buy tickets on Mariners.com, you can actually chose what seat you want. Not just choose a section or price level, but the actual seat. I was able to get aisle seats for each game where the seat next to it was also available. Since I'm buying just the one, hopefully there won't be another single person buying those seats. Elbow room!
Tickets are more expensive than Miller Park. Upper level (Terrace Box at Miller Park) behind home plate was $45 including all the fees for each game.