Read a Q&A with a Texas Tech 247 reporter this morning. While Tech did not have the best pass defense in the nation, they did have one thing - turnovers. The defense ranked 6th in the nation in turnovers gained by having 15 fumble recoveries and 14 INTs.
Another thing is the personnel. Scott had 8 of the 10 players on the two-deep for the secondary from the 2017 recruiting class. According to the reporter, the starting five DBs were two redshirt freshmen, a sophomore, a redshirt sophomore, and a JUCO player, and four of those five were recruited by Scott.
One big note is his preferred DB size. He likes tall, long-framed, physical DBs. Just like Nick Saban.