September through April, a group of regional male retirees get together at Our Savior's Lutheran Church in Cloquet on Friday mornings to try their hand at dartball.

Players ranging in age from their late 50s to their late 90s continue to play week after week and year after year, with the league now decades old. The Cloquet league is very informal, with teams chosen randomly each week, which means a new champion each week too.

"That's two weeks in a row of my team winning all three games," said 90-year-old Bob Fuller after a set in early April. "I wonder if my wife will believe me when I get...