Anatomy of a Play: Lance Kendricks beats Patrick Willis for two must-have points

Situation: 2-point conversion try from the 7 yard line. 3:04 left in 4th quarter, trailing by 2 Personnel: 11  Play: Trey Left Motion, 67 X-Dig F Rub / Sneak Defense: Cover-1 Man This week we look at a pivotal two-point conversion by tight end Lance Kendricks.  My initial thought when I first saw the play was that is was an old Bill Walsh drive concept play.  Walsh used to use this play by sending Jerry Rice in motion toward the formation and at the snap he would be full speed running a shallow crossing route.  Behind Rice, the tight end would be running a dig.  If it was man, it was awful tough to cover Rice by chasing him all the way across the formation.  If zone, the tight end was suppose to fill in a hole in the defense where they were jumping the crossing Rice. However, with Jackson there was another shallow crossing route.  Two shallow crossing routes run together ar...