SANTA CLARA -- It did not come as a surprise to those in the huddle when 49ers coach Kyle Shanahan dialed up a running play on a third-and-8 situation in the first quarter of a scoreless game.
Shanahan told his offense throughout the week that they could exploit some of the Green Bay Packers’ exotic third-down defenses with third-and-long trap plays out of the shotgun formation.
Or the 49ers could have gained some yards to merely give kicker Robbie Gould a closer shot at a field goal.
On the play, Packers linebacker Kyler Fackrell lined up over the left guard and was allowed an unblocked path into the backfield.
Outside linebacker Preston Smith got upfield on the left edge but Mostert sped past him after taking the handoff from quarterback Jimmy Garoppolo.
Programming note: NBC Sports Bay Area feeds your hunger for 49ers Super Bowl coverage with special editions of “49ers Central” all week (5:30 p.m. Monday and Wednesday; 8:00 p.m. Tuesday and Thursday; 6:00 p.m. Friday)
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