With week four of the NFL season basically wrapped up, teams are starting to assess the injuries they suffered this week. However, not all injuries are the same in terms of who got injured and what their injuries are.

Derek Carr and Marcus Mariota

Oakland Raiders quarterback Derek Carr was injured in the third quarter of the Raiders' loss to the Denver Broncos. Carr twisted awkwardly while being sacked and took a knee to his back, which he immediately grabbed. However, Carr only has back spasms and head coach Jack Del Rio doesn't believe it will be a problem.

The Tennessee Titans pulled quarterback Marcus Mariota in the third quarter of their blowout loss to the Houston Texans. He was deemed questionable to return with a hamstring injury. Mariota is scheduled to undergo an MRI today, which came back with good news. He is day-to-day with his injury.

Dalvin Cook

Early in the third quarter of the Minnesota Vikings' loss to the Lions, rookie running back Dalvin Cook went down with a non-contact knee injury, fumbling in the process.

He was able to walk off of the field under his own power to the locker room. Today, head coach Mike Zimmer announced that the first-round pick tore his ACL.

Chris Carson

During a run in the fourth quarter of the Seattle Seahawks' big Sunday night win over the Colts, starting running back Chris Carson got injured.

The rookie's left leg got pinned under a defender and he had to be carted off of the field with an air cast on his leg. Carson suffered a fracture just below his knee and is going to likely miss an extended amount of time. Some combination of Thomas Rawls, Eddie Lacy, C.J. Prosise, and J.D. McKissic will now take up Carson's carries at running back.

Jordan Matthews

The Buffalo Bills lost top receiver Jordan Matthews in the fourth quarter of their impressive victory on the road against the Falcons. Apparently, he suffered a thumb injury that he is going to need surgery on and will miss about a month. Rookie second-round pick Zay Jones and free agent acquisition Andre Holmes will now need to step up with Matthews out.

Rees Odhiambo

The Seattle Seahawks also lost starting left tackle Rees Odhiambo last night in the third quarter.

He took a hit to the chest and was having trouble breathing, so he was hospitalized. Odhiambo suffered a cardiac contusion.

Sources told ESPN's Adam Schefter that he is meeting with cardiologists to determine the extent of the injury and how long he will be out. Odhiambo was already replacing George Fant, who tore his ACL during the preseason. Matt Tobin/Isaiah Battle are the two in-house options likely to replace Fant.
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