In 2005, Canseco admitted to using anabolic steroids with Jorge Delgado, Damaso Moreno and Manuel Collado in a tell-all book called "Juiced: Wild Times, Rampant 'Roids, Smash Hits & How Baseball Got Big." In the book, Canseco specifically identified former teammates Mark McGwire, Jason Giambi, Rafael Palmeiro, Iv�n Rodr�guez and Juan Gonz�lez as fellow steroid users, and claimed that he injected them. Most of the players named in the book have denied steroid use.
Jose Canseco hit a long home run to left-center field on the third pitch of the first at-bat of his United League Baseball debut.
The 46-year-old Canseco did not start, but he pinch-hit with a runner at second and two outs in the bottom of the sixth. The home run gave the Broncos a 15-6 lead.
Canseco came up with a runner at first and no outs in the eighth, but he bounced into a double play on the eighth pitch of the at-bat.
Canseco, a central figure in baseball's steroid era, was introduced Monday as a member of the Laredo Broncos -- one of six teams in the United Baseball League.
Canseco said he will be the designated hitter, serve as a bench coach and pitch for the team. He'll play in Laredo's remaining six home games this season.
The former slugger named names and detailed steroid use around major league baseball in two memoirs. In one, he admitted using steroids and claimed that up to 85 percent of players also did.
Canseco hit 462 home runs in 17 major league seasons. He was the AL Rookie of the Year in 1986 and MVP in 1988, after he hit 42 home runs and stole 40 bases.
"My first step was getting back into the game, in whatever way, shape and form," Canseco said. "I don't know how I'll perform physically, since I'm 46 and haven't played at this level in a long time. We'll see what happens."
Byron Pierce, the UBL president, said luring Canseco was "one of the highlights of our league."
"This isn't something that happens every day," he said. "It's a long way from Major League Baseball to the United League, but we're happier than heck to have him here."
Since retiring from baseball in 2002, Canseco has done guest spots on television shows and flirted with boxing and mixed martial arts. He said Monday that he feels "completely severed" from baseball since writing the tell-all books.
When the Broncos open an eight-game road trip on Thursday, Canseco says he'll stay in Laredo and host youth baseball camps. He also said he'll continue to work on a reality TV show that is still in its first stages.
"I think age, time, environment, situations -- things that happen in your life, they constantly change you," Canseco said. "I'm constantly growing, changing, adapting and hopefully it's for the better."