That depends, Al. Ron Shandler has tracked the catcher-power-spike-in-their-30s trend for a while now. It seems to happen more often in backups, but IIRC, didn't Lopez miss some time the past couple years? It might have been a contract year, but he might also be finding that second wind in his power stroke that a lot of catchers his age seem to experience.
Tom. If you have those numbers. I'd like to see them. Because, everything i've seen says catchers numbers decline after they reach the age of like 30.