New Orleans Saints tight end Coby Fleener (82) catches a pass for 33 yards from New Orleans Saints quarterback Drew Brees (9) during the first half Sunday, Nov. 5, 2017, at the Mercedes-Benz Superdome.

The concussion that tight end Coby Fleener suffered against the Los Angeles Rams may have ended Fleener's season.

New Orleans placed Fleener on injured reserve on Saturday, a move that will keep him out for at least the rest of the regular season. 

Fleener, who has caught 22 passes for 295 yards and two touchdowns this season, was injured when Blake Countess hit his helmet on a throw over the middle in the fourth quarter of last Sunday's loss to the Los Angeles Rams.

Initially, Fleener did not have symptoms of a concussion, according to Saints coach Sean Payton, and he was allowed to re-enter the game. Tight ends coach Dan Campbell noticed Fleener struggling with his vision on the next series and pulled him from the game.

A small window of opportunity exists for Fleener to return. NFL teams are allowed to designate two players for return from injured reserve, but they must miss at least six weeks of practice, then come back and practice for two weeks before returning to game action. 

If New Orleans advanced to the Super Bowl, Fleener would be eligible to come back, but whether Fleener is a candidate medically for such a designation remains unclear.

The Saints brought up tight end Garrett Griffin from the practice squad to replace Fleener. Griffin, a second-year player from Air Force, has been on the practice squad for each of the past two seasons.

The Saints also made a move in the secondary. New Orleans waived cornerback De'Vante Harris, who started last week against Los Angeles and was pulled in the second half due to ineffectiveness, and promoted rookie Arthur Maulet to the 53-man roster.

Harris has struggled when he's been given a chance on defense in each of his two seasons in New Orleans. Initially, Harris opened the season as the Saints' third cornerback, but he lost that role after the season opener.

With Marshon Lattimore and Ken Crawley out with injuries, Harris started again last week and struggled, leading to the Saints bringing in veteran Sterling Moore to replace him.

For the season, Harris has 15 tackles and two passes defended.

Follow Joel A. Erickson on Twitter, @JoelAErickson.