Notice the games played difference? McGwire's brother stated it (steroids) helped Mark play everyday. In ARod's first seven years with Seattle - he never played 162 games.Bottomline, there's no distinctly observable boost in ARod's HR production that we wouldn't have expected from him simply physically maturing.
Three years in Texas - he played 162 twice, and 161 that last year. WE know he used in 2003. We do not know after that, but this all started hitting the fan a few years ago with greater intensity.
2008 and 2009 he played 138 games and 124 games. Looks suspicious.
Play more = hit more HR's = botched record books.