They knew the Lions would run it twice and face a 3rd and long. So they stacked the box to stuff the run and forced a FG attempt
As the article points out Patricia is known to be conservative. “…Matt Patricias conservative play calling is well documented. For example, only one coach punted inside enemy territory on 4th & 6 or less last year than Patricia. He also shifted the Lions from a pass heavy team to a run first team, something that Pederson mentioned factoring into his call. He expected two runs and the Lions gave him two runs…”