Current Bronco Emmanuel Sanders is a big fan of the still-unofficial trade slated to send quarterback Joe Flacco to Denver for a fourth-round draft pick.

Former Bronco Elvis Dumervil is ... not.

The team's former pass-rusher confided to TMZ Sports that "desperate" general manager John Elway took a "big gamble" by acquiring Flacco, who's "no Peyton Manning."

"Definitely desperate, no doubt ... It can be a great deal, or it can be another bad decision by John Elway," Dumervil said.

The parallels between Manning and Flacco are loose, at best. Elway impressively talked the greatest statistical QB of all-time into choosing the Broncos, a feather-in-the-cap feat that changed the course of NFL history. This is a far cry from merely collecting 34-year-old Flacco off the scrap heap, as Baltimore was likely to cut him after hitching their future to Lamar Jackson.

To Dumervil, who spent three seasons (2013-16) in Baltimore, the chief concern lies with Flacco's assimilation into Denver's offense, which is now coordinated by first-time play-caller Rich Scangarello. Although Scangarello is a product of the Kyle Shanahan-Gary Kubiak coaching tree — the system Flacco ran in Baltimore — Dumervil fears he isn't skilled enough to shoulder the load.

Unlike Manning.

"[Elway] did a genius move with Peyton Manning," he said. "But unfortunately, Joe Flacco is no Peyton Manning."

Check out Dumervil's thoughts in the video embedded below.

The Broncos are expected to finalize the trade on March 13, the start of the new league season. Flacco will undergo a physical, upon which the swap is contingent, prior to that date. He's already been named the starting QB for 2019.