NFHS 4.7.2c

[Adam]

Originally Posted by rsl

The defenders legs were shoulder width, and not using more than their allowed width, but B2 definitely moved his hip into A1 to make him lose his balance.

I felt that A1 had no business even trying to split the double team, so I let the contact go, but the hip movement was hard to ignore. Obviously, the coach from A saw the hip and wanted a foul.

In retrospect, I think I blew the call.

The rule says A has the greater responsibility for contact; not sole responsibility. In this case, if A was getting through legally and B shifted into the path too late, it's a block on B.