I think it's all about bat speed, which usually goes when players get older, and why you often see rapid declines in productivity. It is exacerbated for Joe because he lets the ball get in so deep. Once bat speed drops, you have to do one of 3 things to compensate: 1) guess; 2) start earlier; 3) switch to a lighter bat/ choke up. Most players do a combo of 1 and 2 which is likely why changing speeds was so effective against Joe. Poor pitch recognition is more often than not, poor bat speed which causes guessing or starting/committing too soon. (Think Nishioka). Thus, the players that look like they have a problem with breaking balls, actually have trouble catching up to fastballs. (Think Delmon Young). For the first time I can really remember, Joe looked totally fooled on many off-speed pitches, and simply couldn't catch up to heat. That's a decline in bat speed. My advice, swing a lighter stick. You're not a power hitter anyway.