Marvin Harrison Jr. Mark J. Rebilas-USA TODAY Sports

Arizona Cardinals rookie star wide receiver Marvin Harrison Jr. made his regular-season debut during Sunday afternoon’s showdown with the Buffalo Bills, but it’s safe to say that it didn’t go quite as expected.

Marvin Harrison Jr. had just one catch for four yards in the game. Part of the reason for that is that he had just a 6% separation win rate, meaning he wasn’t exactly beating defensive backs and getting open. And as the social media account Gridiron Grading pointed out, this isn’t necessarily a new trend for the star rookie.

“Marvin Harrison Jr. with a 6% separation win rate in Week 1. We charted him with a 30th percentile separation score (on targets) in college. It was a large reason he was our WR3 in the 2024 draft. Not to say he won’t find ways to win in the NFL, but this is not a new trend,” Gridiron Grading said in a post on X, the social media website that was formerly known as Twitter.

Needless to say, this is pretty horrible news for Harrison as he begins his rookie season, and it led to a lot of reactions on social media.

We’ll have to see whether or not Harrison can improve on this performance this week against the Los Angeles Rams.

[Gridiron Grading]