The Vanderbilt Commodores have fired defensive coordinator David Kotulski, Adam Sparks of the Tennessean reported Monday. Kotulski spent one year with the program, following head coach Derek Mason from Stanford in January. Kotulski also served as the linebackers coach.

The move comes five days after the team decided to part ways with former offensive coordinator Karl Dorrell, wide receivers coach Marc Lubick and strength coach Bill Hughan. Mason has now fired four of his 10 assistants from his first-year staff.

Vanderbilt’s defense ranked No. 70 in total defense, No. 50 in passing defense and No. 86 in rushing defense. The Commodores also ranked No. 103 in scoring defense, allowing 33.3 points per game.

Kotulski has severed as a defensive coordinator at several schools, including Lehigh, Holy Cross, Utah State, Bucknell and Saint Mary’s.