To say Harvey's start against Jordan Zimmermann and the Washington Nationals is the biggest game of his career is just the tip of the iceberg. This might be the biggest game the New York Mets have played in at least seven years.
If they win it -- that is, if Harvey delivers -- the Mets will lead the National League East by six games with 24 left to play, and they'll be nicely positioned for their first postseason appearance in nine years.
Other than that, there's not much on the line at all.
When the Mets showed up in Washington on Monday, the Nationals were riding a five-game winning streak that had cut New York's division lead to four games.