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24/B4: Grant McCartney

CLIP07/10/16

Follow Grant McCartney on this NBC digital exclusive as he gets ready for his Los Angeles Final run on American Ninja Warrior.

Reality and Game Show Primetime Web Exclusive
Appearing:Matt IsemanKristine Leahy
Tags: american ninja warrior, ninja warrior, 24b4, nbc digital series, ninja warrior digital series, ninja warrior bts, ninja warrior behind the scenes, ninja warrior 24b4, grant mccartney, Los Angeles Finals
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