Jack McKeon, 88, has been hired as a senior adviser for the Washington Nationals.
McKeon's son, Kasey, is the Nationals' director of player procurement.
A two-time National League Manager of the Year (1999, 2003), Jack McKeon managed five franchises, including the Marlins. He had a lifetime 1,051-990 record over 16 seasons.
McKeon is not the oldest senior adviser to GM Mike Rizzo. That would be Rizzo's father, Phil, 89, a longtime scout who joined the Nationals in 2009.
The Athletic first reported news of McKeon's hiring.