The 49ers signed rookie cornerback Ahkello Witherspoon to a four-year contract on Friday, leaving only three members of their 10-man draft class unsigned.
They are: First-round picks Solomon Thomas and Reuben Foster as well as quarterback C.J. Beathard, who like Witherspoon was a third-round pick.
Witherspoon, 22, played only one season of high school football at Christian Brothers in Sacramento. But his combination of size and fast feet — which he acquired from playing soccer — caught the eye of Colorado coach Mike McIntyre.
Witherspoon played cornerback there the last two years and in 2016 led the nation with 22 pass break-ups. He lined up at right cornerback in the 49ers’ recent rookie minicamp and will compete with Rashard Robinson, Dontae Johnson, Will Redmond and others to start this season.