that kerley stat they posted is misleading. They're giving him credit for both passing and receiving, and not counting the other end of the play (Sanchez throw to Kerely and Mulligan catch from Kerley). You can say Kerley has been involved in a certain amount of yardage plays, but the way they said it was wrong and misleading.
One has to wonder if many of these penalties are not being caused by Sanchez's attempts to draw the defense offsides every play. It seems crazy that every member of the OL is suddenly have problems with the snap count. More likely Sanchez is a big part of the problem.