Borland #3
49er ILBs are asked to be very active in pass coverage, particularly when pattern matching. Communication during the play (post snap) is vital to the success of the coverage. Here, Borland shows quickness to communicate.
The TE will run a drag route.
As soon as the TE crosses Borland's face, he gives the 'Under' call to Wilhoite. You can see Borland pointing with his right arm extended. He's talking to Wilhoite. The 'Under' call means that a WR has crossed in front of Borland and is entering Wilhoite's zone. Wilhoite needs to be on alert.
Same moment as pic above. Wilhoite is riding the TE on his side of the field up the field. Once Wilhoite hears the 'Under' call, he knows to peel off of the TE that is going vertical and look for the route coming into his zone, then match (man cover) that pattern (#88's drag route).
Incomplete pass as Wilhoite smacks the TE just as the ball arrives. Wilhoite gets the pass defensed (I think), but Borland gets the imaginary assist.