Just a note… When I talk about “peak value”, like Bill James (whom I am shamelessly copying) I’m not talking about what a player did any one season. I mean, Ken Caminiti in 1996 had a season roughly equivalent to Chipper’s best season (1999); that doesn’t mean Caminiti’s “steroid”-enhanced peak was as high as Chipper’s. That was a fluke. For that matter, Chipper’s 1999 was a fluke, but less dramatic. “Peak” here means what a player did over a course of seasons, three or four or five. So if Willie McGee was roughly as valuable as Dale Murphy in 1985, that doesn’t mean his peak value was the same as Murph’s, because Murph had several seasons as good or better and McGee had a fluke year.