NEW ORLEANS -- Who was Dat?!

Quarterback Drew Brees threw four touchdown passes to four different undrafted players on Thursday night as the New Orleans Saints beat the rival Atlanta Falcons 31-17 for their 10th straight victory.

The Saints are the first team in the Super Bowl era to have four different undrafted players with a receiving touchdown in a game, according to ESPN Stats & Information.

Also, according to the Elias Sports Bureau, New Orleans is the first team since the 1984 Pittsburgh Steelers to have four different players score their 1st-or-2nd career touchdown in the same game.

Brees also tied a NFL record -- set by Falcons QB Matt Ryan in 2016 -- by throwing TD passes to 13 different players this season.

Those four players (third-year WR Tommylee Lewis, second-year WR Austin Carr, first-year TE Dan Arnold and rookie WR Keith Kirkwood) had a total of only two career TD catches heading into Thursday's game.

But Brees, who is having a season for the ages at age 39, hasn't any trouble improvising while the injuries keep piling up in New Orleans' receiving corps this year.

Rookie starter Tre'Quan Smith was ruled inactive with a foot injury before Thursday's game, and the Saints have also lost veteran receivers Ted Ginn Jr., Cameron Meredith and Dez Bryant to injured reserve as the season has gone on. They signed veteran Brandon Marshall for depth last week, but he has not appeared in a game yet.

And yet the Saints (10-1) just keep rolling on with the NFL's highest-scoring offense (37.2 points per game). Brees has thrown 29 TD passes on the season with just two interceptions (including one in the first quarter on Thursday night).

Brees showed similar improvisational skills earlier this week in Sunday's 48-7 rout of the Philadelphia Eagles. The Eagles were the first defense to really focus on taking both receiver Michael Thomas and running back Alvin Kamara out of the Saints' passing game by repeatedly double-teaming both. So Brees said he went to the young receivers on the sideline and told them, "You guys are the matchups. The ball's coming to you. So get ready. We're gonna have a big day."

Sure enough, Smith had a breakout game with 10 catches for 157 yards and a touchdown, Carr caught his first career TD pass, and Kirkwood caught three passes for 33 yards in the first quarter in just his second NFL game.

By adding Carr, Arnold and Kirkwood to his resume over the past five days, Brees has now thrown TD passes to 51 different players in his 13 years with the Saints.

Smith's injury shouldn't be a long-term one. He was able to practice on a limited basis Wednesday and said he was optimistic that he would be able to able to play.

The Saints play again next Thursday night at Dallas.