Does Paul Molitor hitting .341 at age 39 mean Braun will do well at 34? No, it doesn't. It only means that some players will continue to hit well. Probably the best hitter of the last 20 years is Albert Pujols. Age 30: 1.011 OPS 31: .906 32: .859 33: .767 34: .790 35: .787 36: .708 (current season) Great players decline at some point. Pujols decline doesn't mean Braun will next year or whenever - it just means it happens to players - even great players. Perhaps there are indications that Braun (or anyone) will age well (or won't age well). That would be interesting to know. But I know there have been studies showing that players, taken as a whole, peak, stay steady, and then decline at a specific age. You might then take in account body type, injuries, type of player (such as a guy who relies on speed or power or whatever), and other variables and draw some conclusions. Ryan is hitting great right now, and I hope he keeps hitting great. But I expect some decline as the years go along. I don't think anyone thinks he's just going to fall off a cliff, but to have him decline gradually is probably what would be expected. And we have to remember, a declining Ryan Braun is (hopefully) still a much better hitter most other hitters. This is assuming we're positive about Pujols' age. Seems like there have been whispers through the years, almost his entire career, that he's older than his stated age.