Robert Saleh, 2 Pats assistants among young coaches to watch By Tom Pelissero NFL.com reporter   Who is this year's Sean McVay -- the young, up-and-coming coach who may get an NFL head job sooner than later?   This is the third year I've asked the question, and six names from the previous lists have been hired, including Matt LaFleur, Brian Flores and Zac Taylor in the most recent cycle. As I note every year, McVay -- a 30-year-old with three years of experience as