Zimmerman said he wanted to give back to the D.C. community and supply local kids with a field nicer than any he played on growing up .
Zimmerman is now in his 12th season with the Nationals .
Zimmerman , who is now in his 12th season with the Nationals , said he wanted to give back to the D.C. community and supply local kids with a field nicer than any he played on growing up .