Moore, a fifth-round selection (141st overall) out of Kansas State, becomes the second member of the Bears' 2010 draft class to come under contract. Seventh-round choice J'Marcus Webb also signed a four-year deal Sunday.
Named all-Big 12 honorable mention in 2009, Moore spent three seasons at Kansas State, finishing with six career interceptions and 34 passes defended. Moore's size (5-foot-11, 184 pounds) and athleticism attracted the Bears, who were looking to add another taller body at cornerback.
"I know a lot about these guys," Moore said earlier this month at rookie mini-camp. "My dad had been a Chicago Bears fan his whole life, so I've been watching the Bears. I'm familiar with their defense and their defensive backs.
"They are real strong on the defensive side. I just feel I can come in, and not just help on the defense if possible, but maybe contribute on special teams. I just want to come out here, work hard every day and let the coaches put me where they want to put me."
Jeff Dickerson covers the Bears for ESPNChicago.com.