Those numbers are not very valuable at the major league level. Those numbers are absolutely horrible to use in evaluating prospects. You're dealing with significantly worse defenses, a lot more restraints on pitchers (smaller pitch counts, how many pitches a guy can and cannot throw in an outing, the kinds of pitches a guy is allowed to throw in a outing, etc.), smaller parks, worse offenses, and worse bullpens. No one will argue if you're worried about the number of walks and flyballs he gives up. But the numbers you mentioned should be ignored for all minor league pitchers.