New Orleans Saints wide receiver Michael Thomas (13) is upended after a catch during the fourth quarter against the Detroit Lions Monday, Dec. 4, 2016, at the Mercedes-Benz Superdome. The Lions won 28-13.

The New Orleans Saints must face a surging Tampa Bay defense on Sunday without two of their best offensive players.

Wide receiver Michael Thomas and center Max Unger, who have battled foot injuries all week, are both inactive due to the injuries on Sunday. Thomas leads New Orleans with 69 catches, 831 yards and seven touchdowns this season. 

With Thomas unable to go, Brandon Coleman (20 catches, 226 yards, three touchdowns) will likely take a bigger role. 

Unger has been a rock in the middle of the Saints' offensive line. In two years with New Orleans, Unger had missed only snap of a possible 2,015 snaps with the Saints. Without Unger, New Orleans will turn to Tim Lelito at center. 

Middle linebacker Craig Robertson (shoulder) leads New Orleans with 99 tackles, and he leads the Saints by playing 98.4 percent of the defensive snaps. With the loss of Robertson and safety Kenny Vaccaro to a suspension, the Saints will be playing without two of their top three pieces in terms of snaps. 

Safety Shiloh Keo (hamstring), return man Marcus Murphy and a pair of recently-signed players in linebacker Travis Feeney and center Jack Allen round out the inactive list. 

Follow Joel A. Erickson on Twitter, @JoelAErickson.