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RamBill
The most puzzling thing about this play is that Higbee was lined up on the wing on the right and at the snap he slid all the way across the formation to go help Whitworth......why not help Williams?... who obviously needed help

that the db could blitz. Rams knew they were sending only 2 into the pass pattern and if Philly anticipated it, they easily could have blitzed him and had Higbee stayed left it wold be a free shot. So Rams called that protection