[SF_Cardinal_Fan]

Had to defend against medium pass/time out/field goal?

Maybe that's it. At the start of the play I believe the clock showed 9 seconds remaining, so there could have been time for a 30 yard pass play and a field goal.
As it played out, the receiver ran a really nice route, including a change of speed (at about the 15 yard line) which seemed to disorient the DB just enough to throw off his running angle to the receiver.

[SF_Cardinal_Fan]

Had to defend against medium pass/time out/field goal?

Maybe that's it. At the start of the play I believe the clock showed 9 seconds remaining, so there could have been time for a 30 yard pass play and a field goal.
As it played out, the receiver ran a really nice route, including a change of speed (at about the 15 yard line) which seemed to disorient the DB just enough to throw off his running angle to the receiver.