Brees has reportedly been suffering from at least five fractured ribs and a collapsed right lung. The Saints apparently braced for a multi-week absence from Brees, who also missed five games last season with a torn ligament in his thumb.
Despite his lack of aggression down the field, Brees has kept the Saints' offense moving in 2020, throwing for 2,196 yards with 18 touchdowns and three interceptions.
New Orleans added a third quarterback to its active roster by signing Trevor Siemian, the signal-caller's agent, Mike McCartney, announced Friday. Siemian was on the Tennessee Titans' practice squad but has not played this season.
The Saints lead the NFC South through 10 weeks with a record of 7-2.