In Section 314 rows 7 through 12 have 12 seats in each row. All other rows have 18 seats, except the last row (23) which has 20 seats.
Upper Level Outfield seats run down each base line and curl into fair territory down the third base line. Balls landing in sections 301-305 are home runs, but you have a million times better chance getting a third degree sunburn in these seats than a home run. But for night games or overcast days, they are much preferred to sections 310-312 because you are looking directly at home plate and they are among the highest (vertically) outfield seats in all of baseball.
Despite being on the upper level, nearly every section is near a restroom or concession stand. The food isn't as good as on the lower level -- and the beer stands are fewer -- but you'll at least be saving on the ticket price.
Sections 310-312 and 337-339 have a poor angle to the field, which will have you turning your head or body to see the action.