Bill Walsh, former head coach of the San Francisco 49ers, died Monday following a battle with leukemia, a source told Sacramento television station KCRA.

Walsh died at about 11 a.m. at Stanford Medical Center, officials said.

He was head coach with the 49ers from 1979 to 1988. Prior to that, Walsh served as an assistant coach with the Oakland Raiders, Cincinnati Bengals and San Diego Chargers.

Walsh won Super Bowl titles with the 49ers in 1981, 1984 and 1988. He was elected to the Pro Football Hall of Fame in 1993.

He compiled a record of 102-63-1 in 10 seasons with the 49ers, winning 10 of his 14 postseason games along with six division titles.

"For me personally, outside of my dad he was probably the most influential person in my life. I am going to miss him," former 49ers quarterback Joe Montana said.

Known as "The Genius," Walsh perfected schemes that became known as the West Coast offense.

While with the 49ers, he passed on his knowledge to assistant coaches that later became NFL head coaches, including: George Seifert, Mike Holmgren, Dennis Green, Sam Wyche, Ray Rhodes and Bruce Coslet. Indianapolis head coach, Tony Dungy, was a former player of Walsh's.

"The essence of Bill Walsh was that he was an extraordinary teacher," NFL commissioner Roger Goodell said in a statement. "If you gave him a blackboard and a piece of chalk, he would become a whirlwind of wisdom. He taught all of us not only about football but also about life and how it takes teamwork for any of us to succeed as individuals."

Walsh also worked at the NCAA ranks. He had two stints as Stanford University's head coach, from 1977-78, and again from 1992-94.

"Like the rest of the world, Stanford knew Bill Walsh as a great coach," said university President John Hennessy. "But we also knew him as much more than that: a true leader to his colleagues and a role model for the young men and women he worked with. His loyalty to Stanford was absolute, and he returned again and again to support the university long after he moved beyond his head coaching duties. Stanford is fortunate that he chose to give so much to the university and we will long remember his integrity, dedication and sense of values."

Walsh was diagnosed with leukemia in 2004 and underwent months of treatment and blood transfusions. Walsh publicly disclosed his illness in November 2006.

He is survived by his wife, Geri, and two children, Craig and Elizabeth.

Walsh's son, Steve, an ABC News reporter, died of leukemia at age 46 in 2002.