When Detroit Lions management and ownership met with the media last week and declared that head coach Matt Patricia would return, one of the developments that came out is that there will be changes on Patricia’s staff.

Those changes have not been made public yet, but it’s easy to speculate that defensive coordinator Paul Pasqualoni will be one of those changes. The veteran coach turns 71 this summer, and the Lions defense under his tutelage has been a major disappointment in 2019.

If Patricia must part ways with his mentor in Pasqualoni, here are 10 potential replacements for the Lions to consider.

Some have direct ties to GM Bob Quinn and Patricia. Others are from outside that box, which is where the team found offensive coordinator Darrell Bevell last offseason. Bevell proved a very good hire for the Lions, the underwhelming final record notwithstanding.

Presented here in alphabetical order…

Bret Bielema

Current position: Defensive line coach, New England Patriots

Best known for his 7-year stint as the head coach at Wisconsin, Bielema is quickly making a name for himself under Bill Belichick in New England. At 49 and with ample experience defending college offenses, he’s not the typical Belichick disciple. His regrettable time at Arkansas is a bigger concern, though that was as a college head coach. He’s responsible for grooming talents like J.J. Watt, DeAndre Levy and current Lions RT Rick Wagner into better players during their time as Badgers, and he’s doing the same with the young Patriots DL in 2019.

Shane Bowen

Current position: OLB coach, Tennessee Titans

A young up-and-comer, Bowen is in his second year in Tennessee after two prior seasons in Houston with now-Titans coach Mike Vrabel. Both of those organizations draw heavily upon the “Patriot Way” from defensive guru Romeo Crennel–the man whose defense is the base for what Patricia operates.

Bowen, 34, is well-regarded as a teacher of technique and positioning. He’s helped Harold Landry emerge as a double-digit sack threat and has dramatically upgraded Kamalei Correa’s all-around game.

Gus Bradley

Current position: Defensive coordinator, Los Angeles Chargers

Bradley washed out as the Jaguars head coach, but he’s a proven commodity as a defensive guru. He created the “Legion of Boom” secondary in Seattle, a tough physical unit that thrived on disruption. Bradley, 53, worked with Bevell in Seattle under Pete Carroll, and he’s a descendant of the Monte Kiffin coaching tree: base 4-3, pressure from the front four, a mix of man and zone behind it.

He could remain in Los Angeles if the Chargers opt to stick with head coach Anthony Lynn, whose enigmatically talented team has struggled with terrible injuries and poor execution in key moments (sound familiar?).