And He's not complaining.
Why? Well, when former coach Brady Hoke was fired in November, Jackson promptly retired. The next month Jim Harbaugh was introduced as Michigan's next head coach. As many expected, Harbaugh reach out and hired former Wolverine great Tyrone Wheatley as U-M's new running backs coach.
So far Wheatley's coaching style has made it an easy transition from Jackson, says Kerridge.
"Coach Wheatley - he's been awesome," Kerridge said. "He puts it on our backs. He shows us what we need to do. What we need to learn and how we need to do stuff. He is really detail oriented. He knows how to get it done. We just take in as much information as we can from him."
With Harbaugh in place, the next challenge for Kerridge will be learning the Michigan's new offense, which utilizes the fullback extensively.
"This is my third offense in my past five years," Kerridge said. "So you know it's a new challenge. It's pretty hectic at the beginning, it always is. But that is what spring ball is for. You have these months to get prepared for the season. You always know it's going to be difficult coming in. As spring progresses and summer progresses you really get an understanding for the offense."
Another noticeable change on U-M's roster is the amount of fullback it now has. Along with Kerridge, Sione Houma, Bobby Henderson, Brady Pallante and Nick Wolk are all competing for time in the rotation.
"It's been a really nice rotation to have," Kerridge said. "The fullbacks and everyone just looking for that job and pushing each other.
"All of us have been rotating. ... We've been just working it out going back and forth. Just seeing what we need to do and pushing each other."
Michigan plays its annual spring game on April 4.