The fighter I'm making I don't think has anything below a 13 before the level 4 increase...I maxed his strength out to 20 though with the level 4 increase and raised his constitution to 19. If you got just shit roles (especially if you're modifier is in the negatives) let me know and I'll let you re-roll. I don't want people using that as an excuse to roll until they have insanely high stats but I don't want anyone handicapped because of a shit roll.