This is a defensive look the Vikings employ frequently, with two potential blitzers positioned on either side of the center (the double-A-gap), and one, both, or neither might come after the quarterback. The protection call has to account for all possibilities. In this case, the two "muggers" are LB Eric Kendricks (54) and S Harrison Smith (22). At the snap, Smith drops back into coverage, which frees up C Corey Linsley to help on the right side, and Kendricks is Montgomery's man. Not only does Montgomery get the block, but watch how he finishes it as Rodgers scrambles up the middle to move the chains.