An abundance of factors come into play when signing any player, and there's always the possibility of a player simply not fitting into a team's scheme.
It's too early to tell if Davis will be a complete bust for New York, but his first season with the Jets left much to be desired.
PFF's Sam Monson listed the best and worst 2021 NFL free agent signings with the Jets' addition of Davis as one of the worse ones.
"Signing a player coming off a career year is always dangerous — doubly so when the plan is to transplant him into a significantly worse environment. That’s exactly what the Jets did with Davis, as they hoped he could lead a new-look receiving corps to success with a rookie quarterback. Davis dealt with injuries and only played in nine games, but in those games, he averaged just 1.74 yards per route run — a massive dropoff from the 2.58 he managed last season. "- Sam Monson
NY Jets may end up deeply regretting Corey Davis signing in 2021
Monson also noted that Davis posted the highest drop rate of his career (15.6 percent), and his stats across the board disappointed as well.
Davis' 34 receptions in 2021 tied for his career-lowest, and despite missing games due to injuries, he didn't look like the talented receiver he was in Tennessee.
Prior to signing with New York, Davis hauled in 891, 601, and 984 yards in his last three seasons on the Titans. He may have benefitted from Ryan Tannehill's experience and solid play, but he was also competing heavily for targets against the uber-talented A.J. Brown.
On the Jets, Davis was expected to lead the way for younger players like Elijah Moore to develop in the offense, but Moore (and others) ended up outperforming the fifth-year wideout.
Davis potentially still has his best years ahead of him, and he may gel better with the Jets next season. 2022 doesn't exactly spell boom-or-bust for the wideout, but the team will be expecting some level of improvement.