Joe Mauer took some ground balls at first base Monday before the Twins' game against the Dodgers.  Mauer was instructed by Ron Gardenhire, a former infielder.

Mauer says he's fine with playing first base every once in a while but still considers himself a catcher.  With Justin Morneau out until August with a neck injury Mauer could see time at first base to keep his bat in the lineup.

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