The New Orleans Saints added to their quarterback room Saturday by selecting Notre Dame's Ian Book with the No. 133 overall pick in the fourth round of the 2021 NFL draft.

Following the selection of Book, here is a look at the Saints' current offensive depth chart:

QB: Taysom Hill, Jameis Winston, Trevor Siemian, Ian Book

RB: Alvin Kamara, Latavius Murray, Dwayne Washington, Ty Montgomery, Tony Jones Jr.

FB: Alex Armah

WR 1: Michael Thomas, Marquez Callaway, Juwan Johnson

WR 2: Tre'Quan Smith, Deonte Harris, Lil'Jordan Humphrey

TE: Nick Vannett, Adam Trautman, Garrett Griffin, Ethan Wolf

LT: Terron Armstead, James Hurst, Ethan Greenidge

LG: Andrus Peat, Derrick Kelly II

C: Erik McCoy, Will Clapp, Christian Montano

RG: Cesar Ruiz, Calvin Throckmorton

RT: Ryan Ramczyk, Ethan Greenidge

For the first time since 2005, the Saints are set to enter a season without future Hall of Famer Drew Brees as their starting quarterback.

Brees announced his retirement this offseason after 15 seasons with the Saints and 20 NFL seasons overall.

New Orleans re-signed Jameis Winston in free agency, brought back veteran Trevor Siemian on a reserve-futures contract and retained Taysom Hill from last year's roster as well.

When Brees missed time with a rib injury last season, Hill started over Winston. It appears both Hill and Winston will be given every opportunity to win the starting job entering the 2021 campaign.

Book is a developmental prospect who will hope to make the roster as the No. 3 quarterback in 2021, and he may have ended up in the best possible landing spot.

One of the biggest knocks against the 6'0" Book is his size, but Brees faced similar criticism during his career and developed into one of the best quarterbacks in NFL history.

The 23-year-old Book set the Notre Dame record for wins as a starting quarterback with 30 during his college career and twice led the Fighting Irish to the College Football Playoff.

In 45 career appearances, Book completed 63.8 percent of his passes for 8,948 yards, 72 touchdowns and 20 interceptions while also rushing for 1,517 yards and 17 scores.

Book has some shortcomings in his game in terms of arm strength and even accuracy at times, but he possesses the types of intangibles that Saints head coach Sean Payton will undoubtedly love to work with.