Former Oregon WR Chase Cota has an uphill climb to make an NFL roster as an undrafted free agent. His case to make the Detroit Lions’ roster is off to a strong start.

The Lions shared Monday that Cota is among the NFL’s leading rookie wide receivers after the first week of preseason play. Cota is top-5 in first downs, receptions of 15 yards or more and total receiving yards.

Cota has had an impressive training camp. Lions head coach Dan Campbell has noticed.

“I would say he’s the quiet sleeper, because I think he’s done some things that — every day, it’s positive, but it’s just kind of right under the radar,” Campbell said this weekend, per The Detroit News. “It’s more like, the guy really doesn’t mess things up, and then today he shows up and makes these plays that catch your eye. So when you get a guy who’s where he’s supposed to be, he’s accountable, he can really play all the positions, and now he’s making these plays, starting to produce.”

Cota and the Lions are back in action on Saturday against the Jacksonville Jaguars.