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Oftentimes, what goes overlooked in coaching is the amount of turnover there is among assistants every year, and Wisconsin football has seen plenty of that despite only having two coaching changes over the past few decades.

Along with the arrival of new head coach Gary Andersen, the Badgers had to find replacements at both offensive and defensive coordinator. Having previously worked with Andersen at the University of Utah, Andersen hired former San Diego State offensive coordinator Andy Ludwig to the same position with the Badgers.

He becomes the third different offensive coordinator at Wisconsin in as many years.

In 2012, the Aztecs were No. 20 in the FBS in rushing, No. 36 in points scored and No. 107 in passing, which goes to show that Ludwig emphasized running the football and had success doing so. San Diego State finished in a three-way tie for first place in the Mountain West Conference.

Ludwig hopes to carry over that success to a more prestigious football program at Wisconsin, but first he will have to overcome these three challenges.