Rams' defence one of the NFL's best through four weeks

Arizona Cardinals: The Cardinals' receiving corps let down rookie quarterback Josh Rosen some in his first start, dropping several key passes, including a deep ball to a wide-open J.J. Nelson. However, coach Steve Wilks isn't losing faith in the group of young wideouts. "I'm not down on J.J. nor the other receivers," Wilks said. "I think those guys are improving. You look at Chad (Williams). J.J. is a major part of that, being able to take the top off, as we call it, with his speed. That's a weapon that we like." Rosen knows that connecting on more of those deep shots will aid the offence elsewhere. "That will create separation," he said. "If you get hot and hit a couple deep balls, it will open up a lot of other guys."

Los Angeles Rams: After making several high-profile additions this offseason, the Rams' defence has been one of the NFL's best through four weeks, and it might be about to get better. Linebacker Mark Barron, who had 85 tackles and three interceptions in 14 games last season, has yet to play this season due to an Achilles injury but is expected to make his debut in Week 5 against the Seahawks. "We're hopeful to be able to get him back, and if that's the case, we'll be excited to get Mark back out there," coach Sean McVay said Wednesday. Barron would move right into the starting lineup, sending either Cory Littleton or Ramik Wilson to the bench in base packages.

San Francisco 49ers: Having already lost their starting quarterback (Jimmy Garoppolo) and running back (Jerick McKinnon) to season-ending ACL tears, the 49ers watched both starting offensive tackles and multiple wideouts go down on Sunday. The team has yet to make any roster moves, but that could change as the hits keep coming. "It's the biggest challenge I think in our game," coach Kyle Shanahan said of the rash of injuries. "I know the fortunate thing is ... all of the O-linemen and the receivers I spoke about today, they're not going on IR. They will return eventually, hopefully, sooner than later. ... You hope to weather the storm and get through it and win some close games and you hope to get healthier as it goes, just like we did last year."

Seattle Seahawks: With the Rams coming to town this week, the Seahawks will be facing a player they hoped to add to their own roster this offseason, defensive tackle Ndamukong Suh. After his release by the Miami Dolphins, Suh visited the Seahawks, New Orleans Saints, Tennessee Titans and Rams before joining L.A. on a one-year, $14 million deal. "We weren't able to get close financially on the deal," Seattle coach Pete Carroll said Wednesday of the situation. "But we did a lot of talking, spent a lot of time with him about the thought of it, and he was considering it. But when it came down to it, our cap situation didn't allow it." Suh leads the Rams with six QB hits and is tied for the team lead with two sacks. The Seahawks have allowed 16 sacks this year, tied for third most in the NFL.