re: Better have "Plan B"...We can't stop Clowney.

OK im no OC but here are things I would do as a HC

Talk with officials pregame about the need to control late hits and head to head contact.

Manage the snap count to draw off agressive pass rushers. Consider using short rapid hand motion by the center just prior to the snap to draw off lineman similar to what Fla was doing several years ago in TS. When it finally gets called as a penalty stop doing it.

Spread out O line on his side making him chose to line up outside (too far away), head up (slightly easier to block), or inside (where it is easier to recruit help from OG).

Consider fold or cross blocking even on pass protection. Also permissive blocking, allowing him to over penetrate and effectively getting behind the play can be effective if he will take the bait on the path of least resistance.

Run right at him repeatedly.

Run the end trap with a pulling DT if penetration is too deep on run plays.

Run the screen pass.

If showing tendency to over pursue or follow QB shallow run a reverse. Would be especially effective it set up by several Rivers/Shepard bootlegs/sweeps to the opposite side.

Implement a single TE two back set if he starts jumping over the blocking back. TE releases clean for possible dump pass, first back makes a legal chop block on him and if he goes arial the second back makes him pay for it. You do not want to be partially in the air when Ware or JC hit you. This of course requires remaining lineman block and play is called off if blitz is read.