It’s not difficult to gauge the value Daniel Nava has provided the worst-to-first Red Sox this season. He is fifth in the American League with a .392 on-base percentage and third among AL outfielders with an .844 OPS.
But Nava’s hidden worth to the Sox and manager John Farrell has come on defense.
Nava has started 53 games in left field, 44 in right, eight at first base, and one in center field along with five starts as the designated hitter. No other player on the team has filled more positions.
Nava also has switched positions during a game 24 times.
“That adds so much freedom to the decision-making at the moment,” Farrell said. “We can use Daniel as the safety valve.” Full story for BostonGlobe.com subscribers.