Per the Caps website:
“Washington Capitals center and 2006 first-round draft pick Nicklas Backstrom threw out the ceremonial first pitch before the Washington Nationals-Baltimore Orioles game this afternoon at RFK Stadium. Backstrom, a native of Gavle, Sweden, attending his first baseball game, delivered a strike over the plate in front of the crowd of 29,281 before the Nats’ 4-3 win.”
photo by Mitchell Layton
OFB will attend a press conference that will be held today to introduce Backstrom as the newest member of the Capitals.
On Frozen Blog 
It didn’t mention that he received a pretty decent round of applause.