Sorry BUB, worship your hero, but NO ONE and I mean NO ONe, gets BIGGER , STRONGER, and FASTER in thier late thirties without help.
Barry Bonds is a rare baseball talent, he assured himself of a place in the hall of Fame over 10 years ago. He has been a great player his entire career. BUT, he has always been a guy who would hit 300 with 30 HR, 100 RBI and 30 SB. NOW SUDDENLY after 35, he gains MASSIVE Muscle mass and starts hitting HR like crazy --when every single player in ML history starts dropping off --Sorry, wear your rose colored BLINDERS all you want, Barry is juiced!
Having watched guys like Bryan Erlacher beef up from a college safety to an NFL MLB in a season I'd say that some people can add bulk up in a year or two. Others can lift all they want and not add bulk...it's genetics. Either he's still juicing or he's the first and only person to get off and not drop muscle. I guess we won't really know until baseball tests.