This list are picks that were unnecessary, bad medical history, didn't make the team better when drafted or just plain idiotic. This list is different than just a pick turning out bad:
10. Marquise Hill (RIP) - They had Seymour, Warren and Jarvis Green. Why use a 2nd round pick on another DE?
9. Terrance Wheatley - Wasting a 2nd round pick on a guy with no wrists that you actually need to I don't know...press a guy, tackle a guy and knock down a pass.
8. Jermaine Cunningham - The logic was they took him over Dunlap because he would fit better in a 3-4. They switched to a 4-3 a year later.
7. Duke Dawson - Another DB when they had other pressing needs.
6. Kevin O'Connell - You could argue this as #1. You have a limited number of picks that year in the peak of your Super Bowl window, yet waste a 3rd round pick on a QB when your current QB just led his team to an 18-1 season breaking the TD's thrown in a single season. Pretty idiotic.
5. Jimmy Garoppolo -You're in a 10 year drought with the GOAT at QB with many team needs. Why would this be a good idea? Was this 2nd round pick worth 1 and 1/2 games?
4. Jordan Richards - You had McCourty and Chung, yet take a guy who was completely unathletic. enough said.
3. Dominique Easley - Throwing a 1st rounder down the gutter for a guy with no knees.
2. Ras IR Dowling - They had all night to think about who they were going to take with the first pick in the 2nd round and they waste it on a guy who's had injury history since high school. Just an idiotic pick. A blind man would've taken Jabaal Sheard with that pick as they were in dire need of a pass rusher. Fun fact, Richard Sherman recently said the Pats told him they were thinking about taking him with that pick. Ouch.
1. Slowjuan "Daddy Long Legs" Williams - As I stated above, their secondary was among the best in the league, but had aging WR's in dire need of youth. The GOAT QB on the final year of his deal. The Super Bowl window was closing. It was regarded as a very strong WR class and had their choice of AJ Brown and DK Metcalf. They took a DB who wouldn't see the field.