I've been looking at the OVRs of various Type A and B pitchers, and it seems:
SPs with 75 OVR or higher, and RPs with 70 OVR or higher, are Type A.
SPs with 70-74 OVR, and RPs with 62-69 OVR are Type B.
Does this mesh with what you've seen in your leagues? I know that it's Top 20% and Top 40%, but I'm trying to get a ballpark idea of what that translates to.