(Greg Fiume/GETTY IMAGES)

“I thought, What took me so long?” Johnson said. “I just like round numbers, so that was why I was paying attention. Not that it has any significance.”

Johnson, 69, is in his 15th season as a manager. Johnson won his first game as a manager on April 4, 1984 with the New York Mets at age 41. He took a 10 ½-year hiatus as a major league manager before he stepped in as the Nationals’ manager in late June last season. Among the 38 managers with 1,200 wins, Johnson’s .562 winning percentage ranks ninth.

Johnson also moved closer to another milestone. Tuesday, Johnson will manage his 100th game as the Nationals’ manager. He’s currently 52-47, making the only manager in Nationals history with a winning record. (That’s unless you count John McLaren, who went 2-1 in the three games between Jim Riggleman resigning and Johnson taking over.)