After a rough start to the 2019 regular season, the Pittsburgh Steelers defense quickly gelled starting in Week3. That gelling coincided with the arrival of safety Minkah Fitzpatrick via a Week 3 trade and from that point forward the Steelers defense was one of the top five units in the NFL, and especially against the pass. Steelers outside linebacker T.J Watt played a big part in making the Steelers defense great in 2019 and on Tuesday he was a guest on SiriusXM NFL Radio and discussed not only what led to the unit being so good last season, but his outlook for the unit in 2020 as well.