During the fourth quarter of the Cardinals' home loss to the Rams, quarterback Carson Palmer suffered a concussion and spent the final minutes of the game in the locker room as Drew Stanton quarterbacked the team down the stretch. Palmer's concussion might mean more minutes for Stanton, especially with the Cardinals' Week 5 game against the 49ers coming on "Thursday Night Football."

At his postgame press conference following Sunday's loss, Cardinals coach Bruce Arians indicated that there's a very real chance Palmer won't play this week.

So, obviously, that's not good news for the Cardinals, who shockingly dropped to 1-3 on the season. They were supposed to be Super Bowl contenders, now they're facing the possibility of falling to 1-4.

The 49ers definitely aren't good, but the Cardinals will still be forced to travel to San Francisco on a short week. And if Palmer can't go, they'll be forced to ride with Stanton, who looked unimpressive in relief of Palmer on Sunday.

Stanton went 4 of 11 for 37 yards and two interceptions. One of those picks came with the Cardinals in complete desperation mode, so ignore that one. But his first interception was costly ... and awful, as he stared down his target over the middle of the field.

The 49ers, also 1-3, will have a legit shot to the beat the underperforming Cardinals. I can't believe I just wrote that sentence, but here we are. The Cardinals haven't even looked impressive with Palmer. They'll probably look even worse without him.