131 is a baseline box located behind section S, a small section right next to the field. Row 8 is the first row in this section. You are completely covered by the roofing almost, so you can count on being near the shade in this section. Tickets will generally run in the $40 range.
Great spot for foul balls and the team dugout. The main appeal of these seats is you are close to both the infield and outfield action.