In rather detailed exchanges with higher level CS, I have been told that below average pitches (<50) can serve as a negative.
The ticket was sent in asking why a particular RP was chosen at a particular point, and it can down to a comparison between these two guys -
Alex Smyth (LHP) - 92 control, 75 vLH, 68 vRH, 82 P1, 65 P2, 59 P3, 49 P4, 35 P5, 86 velocity, 51 GB/FB
Tommy McIntyre (LHP) - 87 control, 83 vLH, 65 vRH, 74 P1, 70 P2, 51 P3, 88 velocity, 35 GB/FB
"<snip>
Alex has better control, a significantly better first pitch, a better third pitch, 2 "extra" pitches, better effectiveness vs. RH (the hand of the batter at the plate) and a better GB/FB rating. The *only* things McIntyre is stronger at are P2 (70 vs 65) and velocity (88 vs 86). The P2 difference in favor of McIntyre is more than outweighed by the P1 and P3 differences in favor of Smyth (82 vs 74; 59 vs 51) and the fact that he has 2 additional pitches to go to.
So, are you really telling me that the extra two points (88 vs 86) in velocity makes McIntyre the "most effective of the bunch in that situation" or is there some additional rating that I have overlooked?
<snip>"
CS Response (and I was well past level 1 at this point) -
"And the pitch grades. While one has more pitches, some of the lesser pitches are below average so they can serve as a negative."
("Average" was later confirmed to be 50.)