Two days on the practice field revealed a few truths to Dunta Robinson, one of the veteran cornerbacks signed by the Chiefs as a free agent to help them fortify their pass defense.

“We’re definitely going after the quarterback,’’ Robinson said. “That means us guys on the outside, us corners, we’ve got to hold up. We’re going to play a lot of man coverage. We’ve got to make sure we’re fundamentally sound and make sure we’re confident in what we’re doing, and we’ve got to go out there and make plays. They’re trusting us a lot in this defense.’’

To play that kind of defense, the Chiefs’ new administration of general manager John Dorsey and coach Andy Reid signed not just Robinson but also Sean Smith to join Brandon Flowers to be their top three cornerbacks.

Javier Arenas, who finished last season as the other starter, is now the fourth cornerback.

Flowers has been one of the Chiefs’ better defensive players since he arrived as a second-round draft pick in 2008. Robinson with Houston and Atlanta and Smith with Miami have also been starters.

Flowers was a starter for both of the two practices at this week’s minicamp, which concludes Thursday. Robinson was the other starter Tuesday, Smith on Wednesday. Given the frequency with which the Chiefs use their nickel defense, all three players should get plenty of work.

“They definitely like guys coming in to compete, and that’s something I definitely do,’’ Smith said. “I know (assistant secondary coach) Al Harris from back in Miami, and I think I remember Coach Reid from when I was coming out in the draft. We’re definitely familiar with one another and they like my game.

“We went over the playbook and they told me what they want me to do and what they expect out of me. I said, ‘You know what? I’m more than willing to come out here and put the work in.’ We’ll see what happens from here.’’