You can't always assume siblings will want to play together on the same team. Yet from I've seen from both of the Kalil's publicly they are a tight family and should find the prospect of being teammates a positive. Matt did follow his brother to USC so why not again as a pro.
I get that Kail has underwhelmed for most of his career. But he did have that initial Pro Bowl season as a rookie.
Should they stay or go? 2017 Vikings free-agents: Matt Kalil | FOX Sports
After his first season, the Vikings thought they had themselves a future Hall of Famer.