After running 31 yards on a designed quarterback keep in his only snap of Monday's showdown against the Ravens, Mariota will sit on IR for the next 3 weeks. He will be eligible to return Week 5 against the Bears. Expect Jon Gruden's golden boy, Nathan Peterman, to slide in as David Carr's primary backup.

Marcus Mariota took a designed quarterback run 31 yards on third-and-1 early in the game, but was unable to play for the rest of the contest.

Related players: Derek Carr, Nathan Peterman

While Mariota is Las Vegas’ backup quarterback, Gruden apparently had significant plans for the 2015 No. 2 overall pick saying, “Yeah, we lost a big part of our offense,” Gruden said. “Hopefully it’s not going to linger on.” Peterman is next up on the depth chart.

From NFL Now: It's looking more likely that #Raiders starting QB Derek Carr is back for 2021, while backup QB Marcus Mariota is not. He's been the subject of trade calls.

Derek Carr is currently 4for4's QB17 in John Paulsen's 'never too early rankings'. Six-year veteran Marcus Mariota has garnered some interest from various teams across the league and could find himself a third NFL home in the coming weeks.

Derek Carr (groin) practiced in limited fashion on Tuesday.

Related players: Marcus Mariota

The tweet went on to say both Carr and Mariota got reps and HC Jon Gruden said, "we'll see how it goes this week." Gruden went on to say Carr is "one of the premier competitors in the league ... but we're gonna be smart." Mariota played well in relief of Carr last week and could at least be an option in deeper leagues if he gets the start this week. The Raiders are at home against the Dolphins on Saturday night.

Buffalo Bills at Arizona Cardinals

Arizona Cardinals
QB Brett Hundley
WR KeeSean Johnson
S Deionte Thompson
RB Eno Benjamin
OL Joshua Miles
OL Justin Murray
DL Jordan Phillips

Buffalo Bills
QB Jake Fromm
RB T.J. Yeldon
RB Taiwan Jones
OL Cody Ford
DE Harrison Phillips

Denver Broncos at Las Vegas Raiders

Denver Broncos
QB Jeff Driskel
WR Tyrie Cleveland
CB Kevin Toliver II
LB Joseph Jones
G Netane Muti
T Jake Rodgers

Las Vegas Raiders
QB Marcus Mariota
CB Amik Robertson
RB Theo Riddick
DT Maurice Hurst
T Kolton Miller
G John Simpson
DT Daniel Ross

Los Angeles Chargers at Miami Dolphins

Los Angeles Chargers
QB Easton Stick
T Tyree St. Louis
T Storm Norton
DE Jessie Lemonier
DE Joey Bosa

Miami Dolphins
RB Jordan Howard
RB Matt Breida
RB/WR Lynn Bowden Jr.
FB Chandler Cox
T Adam Pankey

Cincinnati Bengals at Pittsburgh Steelers

Cincinnati Bengals
PK Austin Seibert
RB Joe Mixon
CB LeShaun Sims
G Keaton Sutherland
OT Bobby Hart
DT Geno Atkins

Pittsburgh Steelers
QB Josh Dobbs
RB Anthony McFarland
CB Mike Hilton
LB Jayrone Elliott
NT Isaiah Buggs

San Francisco 49ers at New Orleans Saints

San Francisco 49ers
WR Deebo Samuel
CB Ahkello Witherspoon
CB K’Waun Williams
RB Tevin Coleman
LB Demetrius Flannigan-Fowles

New Orleans Saints
RB Dwayne Washington
CB Ken Crawley
LB Chase Hansen
G Derrick Kelly
DE Carl Granderson

Seattle Seahawks at Los Angeles Rams

Seattle Seahawks
C Ethan Pocic
RB Chris Carson
RB Carlos Hyde
CB Shaquill Griffin
TE Colby Parkinson
CB Quinton Dunbar
DE Benson Mayowa

Los Angeles Rams
OL Brian Allen
TE Brycen Hopkins
T Tremayne Anchrum Jr.
RB Raymond Calais
WR Trishton Jackson

Raiders quarterback Marcus Mariota is ready to return as Derek Carr‘s backup.

Mariota has been designated for return from the Raiders’ practice squad.

The story said he’ll presumably move ahead of Nathan Peterman on the depth chart as the No. 2 quarterback in Las Vegas.

The Raiders are making some changes in their quarterback room.

Marcus Mariota, the backup quarterback who has been struggling with a strained pectoral muscle, has been placed on injured reserve. Under the NFL’s rules for the 2020 season, that means Mariota can return after three weeks.

DeShone Kizer, who spent last season with the Raiders, has been added to their practice squad. A 2017 second-round pick of the Browns, Kizer has some playing experience, both in Cleveland and in Green Bay, and could be called upon in an emergency.

Related players: Derek Carr, Nathan Peterman

Carr, of course, remains the starter but the only other healthy QB on the roster is Peterman at this point.