WASHINGTON, D.C.: Ryan Zimmerman stood on second base, waiting patiently while the umpires reviewed what would eventually be ruled his 11th career walk-off home run. He’d launched a 96 mph 2-1 fastball from Philadelphia Phillies’ closer Seranthony Dominguez to right field in Nationals Park, but it bounced off the silver fence at the top of the wall, in the middle of what Zimmerman called “that terrible little triangle” where the bullpen ends and the end of out-of-town scoreboard/right-center wall meets the stands.