I played this long ago. Would someone please refresh me on what the effect is of a pitcher with more than one rating. How is A+C better than A? Couldn't find the answer to this anywhere on the web.
If the result against the first grade is a hit, use the result against the second grade.
In the specific example, an A&C pitcher stops a 9 with a runner on first, while a regular A gives up a single.
The rarely used A&B pitcher stops even more extra hits.