José Canseco

José Canseco y Capas, Jr. is a former outfielder and designated hitter in Major League Baseball, and is the twin brother of former major league player Ozzie Canseco.

In 2005, Canseco admitted to using anabolic steroids in a tell-all book, Juiced: Wild Times, Rampant 'Roids, Smash Hits & How Baseball Got Big. Canseco also claimed that up to 85% of major league players took steroids, a figure disputed by many in the game. In the book, Canseco specifically identified former teammates Mark McGwire, Jason Giambi, Rafael Palmeiro, Iván Rodríguez, and Juan González as fellow steroid users, and claimed that he injected them. Most of the players named in the book have denied steroid use. Giambi has admitted to steroid use in testimony before a grand jury investigating the BALCO case.

At a Congressional hearing on the subject of steroids in sports, Palmeiro categorically denied using performance-enhancing drugs, while McGwire repeatedly and somewhat conspicuously refused to answer questions on his own suspected use. Canseco's book became a New York Times bestseller. On August 1, 2005, Palmeiro was suspended for 10 days by Major League Baseball after testing positive for steroids.

On December 30, 2007, it was announced that Canseco has reached a deal for his sequel to Juiced. The new book is Vindicated, which Canseco's lawyer, Robert Saunooke, says will hit bookstores by Opening Day 2008. This book is said to have "stuff" on Alex Rodriguez, and Albert Belle as suggested by Canseco. The book will be a "clarification" of names that should've been mentioned in the Mitchell Report. On January 5, 2008, a potential editor for his upcoming book, Don Yaeger, a former Sports Illustrated associate editor, said he would not edit the book. He told the New York Daily News that he thought Canseco didn't have a book in the material he gave him.