Stock Watch: What’s wrong with Zimmerman?

Washington Nationals' Ryan Zimmerman reacts after he struck out during the eighth inning of a baseball game against the Chicago Cubs, Saturday, June 6, 2015, in Washington. The Cubs won 4-2. (AP Photo/Nick Wass)Each week this season, we’ll take the temperature of the Nationals roster to see whose stock is rising or falling.

Record: 2-4

Team slash: .240/.290/.399

Team ERA: 4.42

Runs per game: 3.16

STOCK UP

Danny Espinosa, 2B/LF: .438 AVG/ 2 HR/ 4 RBI

It’s hard to believe, but Espinosa has quietly been one of the great stories on this Nationals club this season. Thought to be a part-time player heading into the season, he’s second on the team in home runs (8), is as versatile as they come and — at…