The Los Angeles Rams defense delivered the first shutout of the NFL season with their dominant performance in a 34-0 win over the Arizona Cardinals. It was the type of performance many expected from that unit after their busy offseason, where they added some high-profile defensive stars in Ndamukong Suh, Marcus Peters, and Aqib Talib.

But despite the Rams defense’s near-perfect showing against the Cardinals, Aaron Donald believes they still have some more room for improvement.

Live and breathe the NFL?

🚨 Get viral NFL graphics, memes, rumors and trending news delivered right to your inbox with the Clutch Newsletter.

“I feel like we can get even better,” said tackle Aaron Donald, per Gary Klein of the Los Angeles Times. “I mean, that’s the scary thing.”

It’s hard to argue with Donald’s assessment of the defense. While they did look impressive against Arizona, the Cardinals offense hasn’t exactly been lighting the world on fire over the first couple of weeks. The Rams will still face far stiffer competition than the Cardinals, and those will be a better barometer for their capabilities.

But as Donald points out, the scary thing is that the Rams may just be scratching the surface of their potential even after pitching a shutout in only their second game together.

Donald and Suh can still get a better understanding of how to play next to one another, especially after Donald missed so much time during his holdout. The same goes for the other parts of the defense, which will still get starting linebacker Mark Barron back after he was inactive against the Cards.

The Rams have already proven their offense is capable of putting up points at an elite level. But if their defense can continue to improve and reach that level as well, they have to be considered one of the top Super Bowl contenders this season.