When Baseball Prospectus was first getting started more than a decade ago, we created a statistic, pitcher abuse points, in an effort to learn what sort of workloads starting pitchers could handle. Controversial at the time because of the inference that it was a predictive tool, PAP was in fact a counting stat, sort of like a warning light on the dashboard of your car -- it gave you cause for concern but didn't tell you a complete breakdown was incipient. However, when PAP was first published, the baseball industry was relatively indifferent on the subject because pitcher workloads weren't as carefully monitored as they are now.
2hLuke Knox, ESPN.com
7dMy Wish 10th Anniversary