A recent tweet from Washington Nationals beat writer Bill Ladson pretty much ends all speculation there might be a chance that the Nationals and former manager Jim Riggleman can work things out after Riggleman abruptly resigned from the Nationals on Thursday:
I just spoke to agent Burton Rocks. Jim Riggleman and the #Nats are #not resolving anything. Rizzo will name an interim manager Friday. #MLBless than a minute ago via TweetDeck 
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William Ladson
washingnats
There is plenty of speculation who might be next to take the Nationals manager role, everyone from third base coach Bo Porter to Davey Johnson have popped up in conversations. Whoever it might be they will be coming on the job in the gravest of situations.