More details on Dan Uggla’s concussion symptoms

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We learned last week that second baseman Dan Uggla played through the 2014 season with an undiagnosed concussion. Nick Cafardo of the Boston Globe provided more details about how the concussion affected Uggla.

Uggla had trouble picking up the rotation on the ball, so he decided to get Lasik eye surgery. He had 20/15 vision. Doctors, however, found that when Uggla moved his head or body, his vision deteriorated to 20/100 — known as oculomotor dysfunction. This both explains his poor performance at the plate and his poor defense in the field.

The Nationals signed Uggla to a minor league contract on the day after Christmas. The second baseman, who turns 35 in March, will try to rebound from an aggregate .617 OPS in 694 at-bats since the start of the 2013 season. He’ll battle Danny Espinosa for the Nationals’ second base job.