Scenes from the Dropkick Murphys show in Lowell

Dropkick Murphys and The Mighty Mighty Bosstones in Lowell
Al Barr (left) and the rest of the Dropkick Murphys will perform again with The Mighty Mighty Bosstones on Saturday, July 12, in Pawtucket, R.I., at McCoy Stadium.

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(Josh Reynolds for The Boston Globe)