Charles O'Reilly can walk from his front door to TD Ballpark in 16 minutes. That proximity is no accident. The Dunedin resident moved from New Jersey in January 2019, planting himself within earshot of a ballpark where he has watched Dunedin Blue Jays games, seven Toronto Blue Jays home games during the COVID-relocated 2021 season, and one rain-delayed contest that ended at 1:07 a.m.

"I was back in the house at 1:25 counting the time to get downstairs and past the gate," O'Reilly told the Tampa Bay Beacons.

O'Reilly has attended professional baseball games at 441 stadiums across the country. That total includes all 54 venues where Major League Baseball has been played and 391 minor league, independent league and off-season league parks, according to charliesballparks.com, his personal website. Add college and summer-league venues and the number climbs to 548.

He has been at this for nearly 60 years. A scorecard from a 1968 game at Shea Stadium, filled out by a 7-year-old O'Reilly, is the earliest artifact of the obsession. By the end of 1989, he had visited just six professional parks. Then came a revelation.

"In 1990, I got this wild idea to take a week's baseball vacation, and I enjoyed it so much that it became a regular thing," O'Reilly said. His total reached triple digits by 1996 and he completed every MLB park in 1997.

The pace hasn't slowed. In a typical summer week, O'Reilly attends 6 to 14 games. One recent stretch included six Clearwater Threshers games, three Tampa Bay Rays contests and a complex league game.

O'Reilly isn't just a spectator at Threshers games. He has announced for the Phillies' Low-A affiliate at BayCare Ballpark in Clearwater since opening day 2022. The Threshers held a 50-36 record as of July 11.

His website does double duty as a historical archive. O'Reilly tracks every player he has seen in a professional game dating to 1967, along with color-coded data on triple plays, home runs and no-hitters. The only MLB no-hitter he witnessed in person: Jim Abbott's 4-0 gem for the Yankees over Cleveland on Sept. 4, 1993.

Former players with limited professional experience have contacted O'Reilly after finding their names on the site. For many minor and independent league games through 2004, his entry may be the only publicly accessible box score.

A longtime member of the Society for American Baseball Research, O'Reilly said he plans to travel to West Sacramento in August to see the Athletics play, making it his 55th MLB venue. He also said he will attend a minor league game at the Field of Dreams in Dyersville, Iowa, that same month.

The Dunedin Blue Jays play home games at TD Ballpark through late August. Schedules are at milb.com/dunedin.