He was fine. Braves singled him to death.
That seems to be the book on the Nats generally the past couple of months - we seem to lose more matches on bloopers and seeing-eye singles than from longball mashing.
Zimmerman did a fair Bill Buckner imitation on that grounder (do you realise that tomorrow it'll be exactly one month till the 25th anniversary of The Botched Grounder Heard Round The World? How time flies....).