He was 84.
In addition to his role in bringing children's baseball to Calistoga, Tedeschi was a locally recognized third baseman for the Chicago Cubs minor league organization.
"He liked that it was an American game," son Fred Tedeschi said. "He was good at it and followed it and knew it well."
Tedeschi was born in San Francisco and attended Mission High School in San Francisco and Calistoga High School in Calistoga before joining the Navy and fighting in the South Pacific during World War II.
He returned from the war to work in Calistoga's post office, where he worked for 30 years before retiring in the mid-1980s. It was a job Tedeschi excelled at, his son said.
"He knew everybody and everything around here," Fred Tedeschi said.
Tedeschi's position as assistant postmaster helped him to create Calistoga's Little League, daughter Linda Thomas said.
Tedeschi enrolled the town's first Little League team and coached them himself.
"He just wanted to teach kids baseball," Fred Tedeschi said. "He knew all the kids and all the families from the post office."
Tedeschi continued to coach baseball through the early 1980s.
In the early 1990s the Little League named its Calistoga field in honor of the group's founder.
Tedeschi is survived by his wife, Peggy Tedeschi of Calistoga, children Fred Tedeschi of Chicago, Linda Thomas of Camp Sherman, Ore., Larry Tedeschi of Santa Rosa, seven grandchildren and five great-grandchildren.
The family is not holding services but asks that memorial contributions be made to the Calistoga Little League.