Brothers will be brothers, meaning sooner or later they have it out in the backyard.
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For Joe (21 at the time and 9-1 professionally) and Dan Lauzon (just 17 at the time and still an amateur), the duo threw down in 2005 in one of the wilder backyard brawls we've seen.
Check out the no-limit, no elbows or knees contest above.
