Where will the band set up following tonight's game? Any human I get on the phone for the Nats does not seem to know. Will they play if it rains?

Pure guesses here. Stage will probably be set up just beyond the infield, facing home plate. I don't think they will play if it is raining, unless they have a big cover over the stage. Not likely.

Maybe they'll play at the bullpen right outside the park

I have to wonder if "Wallflowers" refers to a musical group or the pitching staff

Wallflowers concert was great! People were really enjoying it I like the NatsLive concept

How long did the concert last and where there other performers?

Wallflowers played for about an hour. No other performers, there was about a half hour gap between the end of the game and the concert starting. Stage was setup in the back of the infield and essentially faced home plate. Also they were allowed to sell beer again once the concert started.

Thanks. Sounds like a good time had by all