No. 1: 49ers cornerback Isaiah Oliver
Staying on the trend of cornerbacks, another massive disappointment from 2023 is Isaiah Oliver, a key free-agent signing the 49ers made at the request of defensive coordinator Steve Wilks to lock up the nickel spot within the secondary.
Oliver, who arrived on a two-year, $6.75 million with over $4 million guaranteed, showed signs of struggling early, however, as he was often on the field late during the Niners' preseason games instead of resting with the rest of the starters and immediate reserves.
Then, when the regular season commenced, Oliver was both a tackling and coverage liability with opposing quarterbacks posting a 101.0 passer rating when targeting him.
Lenoir took over slot duties, and San Francisco has a potential backup in fellow cornerback Samuel Womack, which points to Oliver being a one-and-done player when it comes to his 49ers tenure.
Even if it costs the Niners $1.46 million in dead money in 2024, parting ways with Oliver seems to be the right choice.