Callaway,
I am just a bit further down the road than you are. I won't be 48 and 6 mos for another week. I cruise at about 58 to 60 during normal BP and 62-64 when I just allow my arm to hurt. I was able to top out at 70 last year but am down to 68 or so this year. Of course you have a 30lb weight advantage and an inch height advantage on me so I predict that your arm will give out soon as you'll be trying to get Boomer ready to handle post-season smoke. I'm going with a lot of soft toss and short toss myself since I can't throw as hard as the better 13 and 14yo pitchers anyways, although I do have better breaking stuff, so my arm should degrade gracefully.