That's when the real workout began.
The number of priests in the region, on the decline for years, has dwindled further since 2004, from 14 to 10. As Catholic churches throughout the world celebrate Holy Week, the sacred - and busy - period on the Christian liturgical calendar, Hannon's road-warrior routine has become even more frenetic.
Palm Sunday was an apt illustration.
First came an 8 a.m. service at St. Michael Church in Frostburg, then a change of clothes before driving to Grantsville for St. Ann Church's 10 a.m. service.
An 11:30 brunch-fundraiser at a church couple's home was next, followed by the annual Palm Sunday parish dinner at St. Peter in Westernport, about 40 minutes away.
Back home that evening, Hannon prepared oil stocks to take to the cathedral in Baltimore the next day for Chrism Mass and did administrative work.
"It's great to see how he manages in a kind of uncomplicated way," said Archbishop Edwin F. O'Brien. "He has a natural way to relating to everybody and takes on the challenges he does with great serenity."
A Day Planner for Hannon would read like War and Peace. On a given day he goes from celebrating Mass to performing administrative duties to visiting the sick to holding staff meetings to raising money.
Moreover, his service comes at a time when St. Michael is closing its elementary school and St. Ann is holding services at a funeral home while rebuilding a church destroyed by fire nearly three years ago.
"It is very difficult to make decisions for one parish, let alone six," said St. Ann parishioner Jennifer Adams. "He is truly a shepherd and has taken on that role beautifully."
Hannon grew up in the Armistead Gardens neighborhood of Baltimore. He attended Cardinal Gibbons and Loyola College and the Theological College at Catholic University in Washington.
He went to Western Maryland in July 2005 to pastor two churches - St. Peter of Westernport and St. Gabriel of Barton. A year later, he was named pastor of five more churches: St. Michael, St. Ann, St. Mary of Lonaconing, St. Joseph of Midland and St. Patrick of Mount Savage.
He served all seven with two associate pastors before one left last summer for an assignment in Baltimore and the other left in January to take over at St. Patrick.
"I ask him if he's tired, and he says, 'No.' He just goes and goes and goes," said Betty Clark of Westernport, who attends St. Peter and St. Gabriel. "He is extremely well organized."
Hannon said the total membership of the six churches is about 1,500 families. His schedule is set so that he can visit each parish at least every other weekend. He emphasizes that he receives much help from area priests (one from a college and another from a hospital) as well as church staff.
Often his duties don't end until late in the evening, or just in time to watch his favorite TV show - Law and Order.
"No one day is really typical in terms of something happening constantly," Hannon said during a recent visit to archdiocese headquarters in Baltimore. "The constant is change.