Pre-draft, the consensus on Willis wasn't very consistent across the board. Some guys saw a top 5 pick, others saw an undraftable bust. The 3rd round was a little bit of a slip for him -- those who liked him often gave him some pre-draft comps to Lamar Jackson.
Now, while I know that that's an embellishment and he's not Lamar, when you watch him play and look at that comp, you're kind of like, yeah, I get why they said that.