Vikings coach Kevin O'Connell praised the progress of his cornerbacks this training camp as one of them, second-year pro Andrew Booth Jr., continued to deal with yet another injury-related setback that kept him out of the team's Thursday night practice.
"I think they're off to a really good start of understanding how we're asking them to play," O'Connell said. "And, really, the mind-set, snap in and snap out, can really change whether it's a certain look where they know they may be on an island or they're reading their keys as far as the quarterback's drop or whatever it may be.'
"And then there are looks where it's all about getting their hands on receivers and throwing off the [receivers] and putting in a disruption to our passing game that doesn't allow us to have a rhythm."
Booth left the field with a trainer because of an undisclosed injury on Tuesday. He didn't participate in sessions on Wednesday or Thursday either.
"I want to make sure he's seen the folks he needs to see," O'Connell said. "And work through that whole thing and err on the side of caution."
Meanwhile, rookie third-round pick Mekhi Blackmon continues to work as the No. 3 corner behind Byron Murphy Jr. and Akayleb Evans. Blackmon has done that since the team put full pads on earlier this week. Even with O'Connell's praise for the position, the team hosted free agent cornerback Ronald Darby, the former Bills and Eagles starter, for a workout on Thursday, per a league source.
"What I keep challenging that group to do now is consistency," O'Connell said. "Can we really find guys that can handle everything about our defense in this competition phase?
"And the thing about these [upcoming] joint practices are about the time [the corners] get comfortable, knowing what we do and how we operate, we'll have two straight practices two straight weeks of 100 percent different philosophies, calls. And there won't be a lot of game-planning for that. We'll be asking our guys to go out and execute our systems versus different looks and personnel, and do it in a controlled environment that gets a lot of work for our 1s and our 2s."