Dewees' bonus with the Cubs was reportedly $1.7 million, according to MLB.com's Jonathan Mayo. The outfielder was a semifinalist for the 2015 USA Baseball Golden Spikes Award, and he was named the Atlantic Sun Conference Player of the Year.
A redshirt sophomore, Dewees batted .422 with 88 runs, 12 doubles, eight triples, 18 home runs and 68 RBIs in 60 games for North Florida this year.
• Cubs Draft results
On Thursday, the Cubs also announced the signing of fourth-round pick Darryl Wilson and fifth round pick Tyler Petzmeier. Others to sign include infielder Matt Rose (11th round); left-hander Kyle Twomey (13th), right-hander Kyle Miller (19th), outfielder Alex Bautista (22nd), infielder Sutton Whiting (24th), catcher Ian Rice (29th), catcher Tyler Payne (30th), outfielder Daniel Spingola (31st), right-hander M.T. Minacci (33rd) and outfielder Donnie Cimino (37th).
The Cubs now have signed 14 of their top 20 picks.
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings. You can follow her on Twitter @CarrieMuskat and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.