Baker taught and coached at John F. Kennedy High School in the late 1980's and early 1990's and was at Bishop McCort from 1992-2000.
Bishop Mark Bartchak of the Altoona-Johnstown Diocese said in a statement that he was saddened by the news of Baker's death, but declined further comment citing pending legal action involving the diocese.
A message left for Father Patrick Quinn, the head of Baker's order, the Third Order Regular Franciscans, was not immediately returned.
Judy Jones, assistant Midwest director of the Survivors Network of those Abused by Priests, said the organization still hopes people who know about other abuse allegations against Baker will continue to come forward.
"We feel sad for Br. Baker's family but even sadder for the dozens of boys who Baker assaulted," she said in a statement.
Dan Sewell in Cincinnati contributed to this report.