Vikings roster review: When will rookies J.J McCarthy, Khyree Jackson start?

Kevin Seifert is a staff writer who covers the Minnesota Vikings and the NFL at ESPN. Kevin has covered the NFL for over 20 years, joining ESPN in 2008. EAGAN, Minn. -- The Minnesota Vikings' search for a new quarterback consumed much of their energy, and all of the public attention around them, for the first four months of the NFL offseason. Behind the scenes, of course, the Vikings were working on more than simply the transition from Kirk Cousins to a combination of Sam Darnold and rookie J.J. McCarthy.