In 2020 Drew Lock was one of the least (if not the least) accurate starting quarterbacks in the NFL. This varies depending upon which site you use for your data.
PFR shows Lock was 32nd of 35 qualifiers at on-target percentage (73.9 percent). Only Carson Wentz, Dwayne Haskins and Nick Mullens were worse.
SIS shows that Lock had an on-target percentage of 65 percent. That was better than Daniel Jones, Sam Darnold, Haskins, and Wentz among full-time starters.
For comparison Teddy Bridgewater in 2020 had an on-target percentage of 80.5 percent, according to PFR and 73.