|Denard Robinson had some good times with offensive coordinator Al Borges back in 2011.|
Borges was hired by Hoke at San Diego State prior to the 2009 season, spending the next five seasons (two at SDSU, three at Michigan) together. They had some very good years together in San Diego and things started off pretty well in 2011 when the team went 11-2 and Michigan had two 1,000-yard rushers in quarterback Denard Robinson and tailback Fitzgerald Toussaint. But things started to go south in 2012 when Robinson failed to mature as a passer and the running game festered despite a veteran offensive line. A younger offensive line in 2013 forced the offense to mostly take steps backward again, with historically bad performances against Michigan State and Nebraska.
I hesitate to get into potential replacements, because these things almost never work out like you hope they will. What I would be looking for with the personnel and philosophy Michigan has is an offensive coordinator that has experience with the pistol and multiple tight end sets. As opposed to shotgun, the pistol lends itself more to pro-style and power running, which suits running backs Derrick Green and De'Veon Smith. Meanwhile, Michigan has the horses in Devin Funchess, Jake Butt, Khalid Hill, and Ian Bunting to make multiple tight ends work. Furthermore, quarterback Devin Gardner can run some option looks out of the pistol while still playing in a shotgun type of passing offense that suits his skills. Beyond Gardner, who's only around for one more year, Michigan has quarterbacks Shane Morris and Wilton Speight in the pipeline, both of whose skills are suited to more of a pistol/shotgun spread look. Michigan has a spate of good receivers on the team and headed to campus, and they don't have the maulers up front to be Alabama, so meshing Hoke's power running philosophy with a pistol passing philosophy seems like the best idea to me.
Running backs coach Fred Jackson was Michigan's offensive coordinator in 1995 and 1996 but is rumored to be nearing retirement, making him an unlikely candidate. Wide receivers coach Jeff Hecklinski has been an offensive coordinator in the past, most recently at Central Missouri State in 2002; he was also the passing game coordinator at Arizona in 2003. Tight ends coach Dan Ferrigno has not been an offensive coordinator since 1986 when he was at Western Michigan. Offensive line coach Darrell Funk has never been more than a position coach at the FBS level.
Michigan's previous offensive coordinator, Calvin Magee, spent 2011 as Pitt's offensive coordinator before reuniting with head coach Rich Rodriguez at Arizona in 2012. Before him was Mike Debord, who spent 2011-2012 as the Chicago Bears' tight ends coach before getting hired as the University of Michigan's Olympic sports administrator, a position he currently maintains.