[…] fortunately for Kubiak, who later hired Shanahan as his offensive coordinator, the kid grew up to be a better play-caller than babysitter. Kyle’s dad, Mike Shanahan, was the Broncos offensive coordinator from 1984-87 when Kubiak was Denver’s backup quarterback. Through it all, Kubiak, 55, saw plenty of Kyle, a former wide receiver at Duke and Texas who was a ball boy, attended coaches meetings, caught passes from Denver’s quarterbacks and radiated a passion for football. In 2006, Kubiak’s first year as Houston’s head coach, he hired Kyle, then 26, as his wide receivers coach. In 2008, Kubiak promoted him to offensive coordinator, making him the youngest in the NFL. Kubiak acknowledged Texans owner Bob McNair had reservations about giving a 28-year-old such a title. “I know Mr. McNair, he was concerned — ‘He’s very young’ and those type of things,” said Kubiak, who was 33 when he became Denver’s