Slack announced his decision to commit to the Bulls late on Sunday.
"I just loved the opportunity and the fact that they said I could come in and make an impact right away this fall," Slack told JCFootball.com shortly after completing his official visit. "My host was Khalil Hodge. He's a guy from Northern California too and he was a freshman qualifier too and so that really helped me to realize the opportunity there.
"I could have come back for my sophomore season, but I just couldn't pass up the opportunity there. I might have gotten some other offers if I'd stayed, but it was better for me to get to a place where I'm wanted and needed and that will allow me to get my degree and achieve my goal of going to the NFL."
As a freshman last season at Chaffey, Slack worked his way into the Fighting Owls' secondary rotation, starting four games, and finished with 11 tackles, two interceptions and nine pass breakups.
"Since I was a little kid, I have idolized Darrelle Revis and I feel like I have modeled my game after him," Slack said. "I'm a press-man corner who can also play cover two and cover three.
"I like to play fast and physical and that's what I set out to do every game."
Slack had lots of schools after him as a prep at Upland (Ca.) High School, but he was a late qualifier so he didn't have many options.
"I qualified late and most of the schools that were after me -- Washington State, Hawaii, Utah and Colorado State -- had moved on at that point, so I figured that going to Chaffey was my best option," Slack noted. "Coacy (Rob) Hadaway has taught me so much and helped me get where I am, I can't thank him enough. The whole staff there is excellent and I am happy I chose to head there."
Slack will wrap things up in Northern California this summer and plans to enroll at Buffalo on August 5th with four years to play three starting this fall.