There are a lot of words used to describe Aaron Donald: dominant, outstanding, unblockable, elite. Those phrases are often connected to Donald’s name, which just goes to show how highly everyone from fans to coaches think of the two-time All-Pro.

Bill O’Brien continued to heap praise on Donald ahead of the Rams-Texans game this week, using quite the superlative to do so. Talking about the Rams’ defense, O’Brien couldn’t help but compliment No. 99.

“I’ve been sitting here for a couple days now watching Aaron Donald,” he said on a conference call Tuesday. “This guy’s one of the best players I’ve seen. He’s a great player.”

O’Brien isn’t the first coach to say Donald is one of the best players he’s ever seen. And he certainly won’t be the last. When it’s all said and done, Donald could very well be one of the best players in NFL history, considering the trajectory he’s on.

O’Brien continued by praising the rest of the Rams’ defense, complimenting guys like Alec Ogletree, Michael Brockers and Robert Quinn, who certainly deserve credit for the jobs they’ve done in L.A. However, he was brought back to Donald once again, explaining what makes him so great.

“I just think the way that he plays the game,” O’Brien said. “He’s got a very relentless playing style. He uses his hands well. He’s very quick. He’s an attacking guy, he’s tough guy. You’ve got to block him to the echo of the whistle. He never gives up on a play and he’s a great player.”

Donald has recorded 44 pressures this season, including two games with 10 each. He tops the list of all interior defenders in that regard, and is second in all of football. Not to mention, he missed the first game of the season, too.

After hearing O’Brien praise Donald, one thing’s for sure: He’ll be sure to have plenty of eyes on the All-Pro each and every snap.