The Playside Tackle is going to block the first down lineman outside of the read on Triple Option.
This is how he does this block, known as the Fan Block (often referred to as HPC–High Pressure Control as well).
The Trips formation creates a numbers advantage to the Trips side. This forces the defense to bring someone over from the backside to the formation-side to match numbers. Otherwise, the offense has the numbers advantage. If this is the case and they set the 3-technique to the formation-side, run Midline White.