Mike Traini of "Fight Massachusetts" has a post and an interview with 2019 DL recruit Cletus Mathurin.
Mathurin is 6-2 290. UMass needs a huge upgrade in size, speed and athleticism in the defensive front seven. Out of a 129 FBS teams UMass finished 123rd in total defense, 125th in rushing defense, 126th in scoring defense and 111th in red zone defense.
The Minutemen also finished 128th in sacks.
In addition UMass loses defensive linemen Joe Previte (a Phil Steele All-Independent selection) and Basit Dennis to graduation.
I doubt Mathurin redshirts.