Verrett, who was listed at 5-foot-10 and 176 pounds by TCU, generally is considered one of the top five corners available, but there are questions about his height, bulk and speed.
"I'm gonna shock them [at the combine]," Verrett told the Sporting News. "They feel like I'm gonna run a slow time. All my life I've been challenged as a smaller, shorter guy. But I'm lion-hearted. They said I was too small to play corner, that I wasn't big enough or fast enough: 'He's not 6-foot.'
"I can't change my height, but I can showcase my speed."
Verrett had nine picks and 34 pass breakups in his three seasons at TCU; he transferred in after one season at a junior college.
He has been training for the combine and other pre-draft events in his home state of California.
"I feel like where I'm at, as far as training, I feel like I can have a good combine," he said. " ... The workouts are crucial. I'm learning different techniques to get my [40-yard dash] starts right and finishing calm. The rest is football drills and football is what I breathe. I'll excel at that."
NFL Media draft analyst Bucky Brooks says Verrett is the third-best corner available, noting he is a "technically sound cover corner with superb instincts, awareness and anticipation. Additionally, Verrett is a willing tackler with a knack for making plays against the run."