|Jay Harbaugh (right) with his dad, Jim|
Jay was a high school defensive lineman, but knee injuries shortened his career. He attended Oregon State and joined their undergraduate assistant coaching program under Mike Riley. He has been an offensive quality control assistant for the Baltimore Ravens for the past three seasons, obviously working for his uncle John, the Ravens' head coach. It's unclear at this point how much Jay had to do with the tight ends themselves, but the Ravens have had some decent players at the position in the form of Dallas Clark, Owen Daniels, Dennis Pitta, and Ed Dickson.
There's a pretty good article on Jay (LINK) that indicates the apple has not fallen far from the tree as far as work ethic goes. Father Jim is known for his competitiveness and work ethic, and the article mentions that Jay is much the same.
Michigan could have made a more impressive hire than getting a 25-year-old kid with no actual coaching job on his resume. At the same time, I'm not inclined to believe that a competitive guy like Jim Harbaugh is going to give his son a job that isn't deserved. It's not like the kid was sitting on his butt or working in a grocery store. He had a pretty solid job with an NFL team, albeit with another member of the family. But there are worse places to learn (such as Oakland) than Oregon State and with the Ravens, who won the Super Bowl a couple years ago. On top of his NFL experience, Michigan has hired a special teams coach, John Baxter, who has extensive experience as a tight ends coach. If there are struggles or questions, Baxter - and Jim Harbaugh himself - could give him some advice. With the very impressive group of coaches Jim has put together in Ann Arbor, I'll be interested to see how this "gamble" works out for the Wolverines. He has some good pieces to work with in Jake Butt, Khalid Hill, and Ian Bunting, along with some potential incoming players like Chris Clark and Tyrone Wheatley, Jr.