You have to play physical versus the run. No. 99 took a non physical path by not physically standing up the OT pushing him toward the inside. If no.99 pushes the OT to the inside, Anderson would have to stop momentum and jump to the outside (what you want a +230 pound back to do vs. run straight to a gap) where he would have be tackled by 2-3 players on the play you illustrated.
This is the type of discussion I had hoped to invoke; although, I don't understand your analysis regarding #99.
Woods is #99, the RDT in this play.
He has to flow to the outside on Zone Runs to the outside.
In this alignment there not really another choice.
The LBs and backside DL must cover cut-backs.
Woods is initially double-teamed by the OC and LG.
The LG then quickly moves to the 2nd level.
The requirement of Woods to flow to the outside takes him out of the play regardless.
The backside DT is #51 Reid. He has a chance to close the gap; although, not really a chance to stop them from getting the 1st down on 2nd and 1.
Reid was blocked by the RG and RT. The RG initially has leverage (inside position) and then hands him off to the RT as the RG moves to the 2nd level.
A great DT in place of Reid probably closes the gap something like 5 of 10 times on this play but probably doesn't stop them from getting the 1 yard.
The alignment in the image that I edited to move players does solve the problem and would give them a chance to prevent the 1 yard need for a 1st.