NEW YORK (AP) -- Jay McGwire heard big brother Mark say last month he only took steroids to heal, and not to get stronger. That doesn't match Jay McGwire's recollection.
"Mark knew that he was going to get the strength and endurance and size. I know that the main motive to justify taking steroids was healing," Jay McGwire said in an interview with The Associated Press. "I know that for a fact. But in the long run he knew the strength and the size and endurance will increase. I don't know why he's coming across that it was all healing."
Estranged from his brother for eight years because of a family dispute, Jay McGwire has gone public in "Mark and Me: Mark McGwire and the Truth Behind Baseball's Worst-Kept Secret," which is scheduled for publication Monday by TriumphBooks.
When he finally admitted last month that he used steroids, Mark McGwire said it was only for healing. His brother said that was the initial purpose but it's obvious the slugger also gained strength.
Jay McGwire says in the book he persuaded his brother to start using steroids regularly in 1994 and set him up with a supplier. He says Mark regularly used an array of drugs that included Deca-Durabolin, human growth hormone, Dianabol, Winstrol and Primobolan in addition to androstenedione, a steroid precursor that wasn't banned by baseball until 2004, when it became a controlled substance in 2004.
Jay McGwire, who turns 40 on May 5, said he was introduced to steroids by bodybuilder friends in 1989, beginning with pills of Anavar.