LOS ANGELES — Veteran Los Angeles Times sports writer Mike Penner, who attracted national attention when he announced two years ago he was a transsexual and was changing his name to Christine Daniels, has died at age 52, the newspaper reported Saturday.

The Times said Penner was found dead at his Los Angeles home and the cause of death was believed to be suicide. He had returned to using the name Mike Penner and was a columnist for the newspaper at the time of his death. A Times spokeswoman said she did not know the exact day he died.

In 25 years with the newspaper, Penner covered Major League Baseball, the National Football League, the Olympics, World Cup soccer, tennis and other sports. A fluid writer with a sharp wit, he worked at various times as a reporter, columnist and the newspaper's Los Angeles Angels beat writer.

"Mike was one of the most talented writers I've ever worked with, capable of reporting on any number of topics with great wit and style. He was a very gentle man who will be greatly missed. This is a tragic ending and a difficult time for all of us who knew him," said Times Sports Editor Mike James.

Times Editor Russ Stanton said Penner "respected our readers a great deal, enough to share with them his very personal journey."

Penner revealed that journey on April 26, 2007, when he wrote a story for the Times headlined "Old Mike, New Christine," in which he revealed he was taking a few weeks vacation and when he returned to his job as a sports writer it would be as a woman named Christine Daniels.

"I am a transsexual sports writer," Penner wrote. "It has taken more than 40 years, a million tears and hundreds of hours of soul-wrenching therapy for me to work up the courage to type those words."

The announcement sent shock waves through the sports world, but Penner's bosses were supportive.

As Penner himself noted, when he revealed his plans to Times Associate Editor Randy Harvey, who was then the newspaper's sports editor, Harvey "leaned back in his chair, looked through his office window to scan the newsroom and mused, 'Well, no one can ever say we don't have diversity on this staff.'"

After his vacation, Penner did indeed return as Christine Daniels, not only continuing to report on sports for the Times but also authoring a blog called "Woman in Transition," detailing his experiences.

Making public the transition, he once said, was the hardest thing he had ever done.

"How do you go about sharing your most important truth, one you spent a lifetime trying to keep deeply buried, to a world that has grown familiar and comfortable with your facade?" he asked.

At the time of his announcement he was married, and he declined to discuss his family situation. He said he was undergoing female hormone treatments but declined to say whether he planned to undergo a sex-change operation.

However, he eventually dropped the "Woman in Transition" blog and returned to writing under the name Mike Penner.

At the time of his death he was writing a column for the Times called Totally Random that focused on offbeat, lighthearted and historic moments in sports. His last one appeared in the paper on Nov. 15.

Information on survivors and funeral arrangements was not immediately available.