After initially preferring to stay away, the 70-year-old former manager plans to visit spring training during its latter stages.
Johnson has said he wants to stay away from camp out of respect to the new manager, but Williams has since invited him.
In honor of his two and half years as Nationals manager, a look back at some of Davey Johnson’s best quotes.
Davey Johnson plans to avoid Viera next spring "out of respect" to the Nationals' next manager.
Dan Haren's excellent, season-ending start lifts Davey Johnson to an unusual benchmark.
The Nationals have yet to decide on their Sunday starter, and the decision, strangely, may depend on Davey Johnson's overall career record.
Davey Johnson wants to make the Cardinals have to earn their NL Central title.
Steve Lombardozzi has been a strong spot on a weak bench, but will it lead to more playing time?
In his final day as Nationals manager in front of the home crowd, Johnson is presented with a gift and love from his players.
If the Nationals had been mathematically eliminated with a significant portion of the season remaining, Davey Johnson would have offered to step down.