Escobar left Friday's game against the Phillies after after attempting to leg out a single, Mark Zuckerman of CSN Washington reports. It looked like Escobar may have tweaked something, though the team has yet to provide an official diagnosis. Dan Uggla replaced Escobar at second base. The injury, even if it's minor, puts the Nationals in a tough spot, as it leaves the club without any reserve infielders at least for the rest of Friday's contest.