For most bleacher sections, rows are labeled A-Y with A at the front of the section. When you enter the section, you enter at row A.
The Left Field Bleachers at Progressive Field are among the most iconic seats in all of baseball. Located in a Grandstand above the high left-field wall, these seats give you a great outfield view of home plate. These are bleacher seats, so they will be a little uncomfortable and good luck seeing the main scoreboard (which is right behind you). But as far as bleacher seats go, these are pretty good. The front row will have to contend with the railing -- but these seats also see the most home runs in Left Field.