Speculation has been rampant for weeks that there will be major turnover on the Minnesota Vikings’ coaching staff, that Leslie Frazier will need to revamp his defensive assistants.

What will be interesting to see is if Frazier’s teammate with the Chicago Bears, Mike Singletary, is impacted. Singletary transitioned from being the head coach of the San Francisco 49ers to joining the Vikings as linebackers coach and there are rumblings in the Twin Cities that his first season there didn’t go well.

Tom Pelissero of ESPN 1500 provides an eye-opening look at the situation as part of a bigger evaluation of the franchise’s position at the end of a 3-13 season. Per Pelissero’s report, concerns about Singletary’s “preparation has raised red flags.” Singletary has designated assistant Jeff Imamura to run position meetings, missed meetings the night before a game at Detroit to attend a wedding and “has occupied himself much of the season with side projects instead of the next opponent.”

Whether or not sweeping changes expected involve Singletary, well, we should find out soon enough. But it sounds like at least some people within the organization are not pleased with Singletary.

Follow me on Twitter: @BradBiggs

Brad Biggs covers the Bears for the Chicago Tribune