“Deca-Durabolin helped with his joint problems and recovery, while growth hormone helped his strength, making him leaner in the process. I became the first person to inject him, like most first-timers he couldn't plunge in the needle himself. Later a girlfriend injected him.” -- Jay McGwire, talking about his brother Mark in reported book proposal
A new book proposal, submitted by the admittedly estranged brother of Mark McGwire, claims the former major league slugger used both steroids and human growth hormone during his career.
In the proposal, first reported Wednesday on Deadspin.com, Jay McGwire alleges that Mark used Deca-Durabolin and that he introduced Mark to performance-enhancing drugs in 1994. Jay McGwire has also come out swinging against his older sibling, claiming he was the reason Mark got involved in steroids.
Jose Canseco, in a book he wrote in 2005, claims he and McGwire, former Oakland A's teammates, used performance-enhancing drugs as far back as 1988. Jay McGwire disputes that in the book proposal.
The McGwire brothers reportedly haven't spoken to each other for years.