And it didn't take long for the younger McKenzie to start up the trash talk.
"I can't wait to whip up on you twice this year and the next year and the next year and the next year after that," Kahlil said he told his father, per Adam Teicher of ESPN.com. "We're a competitive family [by] nature. We compete in everything we do. This just adds one more ripple into that. We're all excited for it. I'm excited to get to Kansas City and just help the Chiefs...whoop up on the Raiders [and] whoop up on the rest of the NFL."
McKenzie, 21, played as a defensive tackle during his college career at Tennessee, though he registered just three sacks in total and was being scouted by many teams as an offensive lineman. The Chiefs plan on having McKenzie make that adjustment, a fact he believes will please his father.
"He had a sly little smile on his face," McKenzie said of his father. "I told him, 'It's a conspiracy. This is you. You did this.' He always wanted me to play offensive line. He was happy to see me play offensive line and said that I moved really well doing it. He said I looked like an offensive lineman doing those drills."
The elder McKenzie didn't dispute those comments.
"I'm proud of him, and I told him that. I told him, 'We take you, we're going to put you on the offensive line, too,'" Reggie said.
"He can play D-tackle, but I think he probably could be special on the offensive line," he added. "And that's where we wanted to play him."
McKenzie last played on the offensive line during high school, but he's ready to make the adjustment.
"They're going to get the absolute best out of me playing the offensive line position," he told Blake Toppmeyer of KnoxNews.com. "Whichever position it is on the offensive line—guard, center—I'll do my very best at it. I think I can come in and dominate that position."