The Dallas Cowboys were reportedly among the teams interested in Mike Vrabel before he became head coach of the New England Patriots. According to

Mike Vrabel said he's excited to work with his new offensive and defensive coordinators, in his first interview since hiring Josh McDaniels and Terrell Williams.

Vrabel hired McMillan in 2021 as a defensive assistant where he primarily worked with Titans outside linebackers. In 2022, he worked as a defensive line assistant coach alongside Williams, who was named the Patriots defensive coordinator. McMillan continued to work with Titans defensive lineman in 2023.