Bolden, who is preparing for his second season in the league, told the team's website: "I'm not going to lie, I was surprised. But I'm a football player and I want to be part of this team.
"I play corner, nickel, safety, so I'm all over in the secondary. I'm just trying to show them my value and do it the best that I can.
"I'm going to have to put in extra time in the film room to become a better player, and just study our defense a little bit more, because there's things that I'm not used to doing."
Bolden made 13 tackles during his first season in the NFL.