No. 1: Kenny Pickett (Pitt)
Malik Willis and Matt Corral were both drafted to be developmental "we hope he can be a starter in a couple years' time" kind of players.
None, aside from Pitt's Kenny Pickett, were wholly seen as day-one starters. Not even Brock Purdy, who was going to be buried on San Francisco's depth chart behind quarterbacks Trey Lance and Jimmy Garoppolo.
Pickett, however, was given the reins to compete with veterans Mitch Trubisky and Mason Rudolph, and the former ultimately took over the starting gig late in his rookie year.
That said, and in the wake of the Steelers firing offensive coordinator Matt Canada for underwhelming results, Pickett is far from cleared from being part of the problem.
Needless to say, and regardless of the coaching staff, Pickett has underachieved and helped make one more team look silly for not drafting Purdy.