The Bears have been moving quickly to wrap up their picks, with six of eight having already agreed to deals.
The 6-foot-3, 315-pound Ferguson had 58 tackles in his lone season as a starter last year and is considered raw after leaving school a year early. He was suspended from the Outback Bowl against Iowa for violating team rules and did not work out at the NFL combine because of a right ankle injury he suffered in the days leading up to it.
In addition to Ferguson, the Bears announced Tuesday they agreed to four-year deals with fourth-round draft pick Ka'Deem Carey (running back, Arizona), sixth-rounder Patrick O'Donnell (punter, Miami, Fla.) and seventh-rounder Charles Leno Jr. (offensive tackle, Boise State).
The Bears also agreed to deals with safety Brock Vereen and quarterback David Fales on Monday. First-round pick Kyle Fuller of Virginia Tech (cornerback) and defensive tackle Will Sutton of Arizona State (third round) remain unsigned.
Carey figures to back up running back Matt Forte after running for 1,885 yards as a junior last season and being picked the Pac-12 offensive player of the year. Leno was a first-team all-Mountain West Conference selection as a senior.
O'Donnell spent four-plus seasons with Cincinnati (2009-12) and Miami, Fla. (2013) and averaged 43.5 gross yards on 234 punts. Last year, he ranked third in the nation with a school record 47.1 gross average on 53 punts.
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