15 worst free agent signings in Las Vegas Raiders history

OAKLAND, CA - AUGUST 19: A detailed view of a helmet belonging to and Oakland Raiders player sitting on top of a Gatorade cooler against the Los Angeles Rams during the fourth quarter of their preseason NFL football game at Oakland-Alameda County Coliseum on August 19, 2017 in Oakland, California. The Ram won the game 24-21. (Photo by Thearon W. Henderson/Getty Images)
OAKLAND, CA - AUGUST 19: A detailed view of a helmet belonging to and Oakland Raiders player sitting on top of a Gatorade cooler against the Los Angeles Rams during the fourth quarter of their preseason NFL football game at Oakland-Alameda County Coliseum on August 19, 2017 in Oakland, California. The Ram won the game 24-21. (Photo by Thearon W. Henderson/Getty Images) /
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Dec 17, 2017; Oakland, CA, USA; Dallas Cowboys tight end Jason Witten (82) is tackled by Oakland Raiders cornerback Sean Smith (21) during an NFL football game at Oakland-Alameda County Coliseum. Mandatory Credit: Kirby Lee-USA TODAY Sports
Dec 17, 2017; Oakland, CA, USA; Dallas Cowboys tight end Jason Witten (82) is tackled by Oakland Raiders cornerback Sean Smith (21) during an NFL football game at Oakland-Alameda County Coliseum. Mandatory Credit: Kirby Lee-USA TODAY Sports /

15 worst free agent signings in Las Vegas Raiders history

No. 11: Sean Smith, Cornerback (4yr-$40M)

Cornerback has long been a positional need for the Raiders franchise, and back in 2016, the team thought they had made a deal for a player who could solidify one of the spots for nearly half a decade. Coming via division rival Kansas City, Sean Smith was instantly inserted into the starting lineup in Oakland, and in his first season, played well.

However, the 2016 campaign would be his best in the Silver and Black, as he struggled in a big way in Year 2, and would end up being benched in favor of Gareon Conley, a first-round pick out of Ohio State. Smith would play only two seasons with the Raiders, being released due to some pending legal troubles for felony assault.

Smith did have a few moments with the Raiders, including a two-interception game against Dallas, but in the end, he was another failed experiment within a position group that has struggled for years. The cornerback would spend five months in jail after his release from the franchise, and the Raiders would be the last team he played for in a nine-year NFL career.