An Oregon TE was just granted a 9th year of eligibility: https://www.si.com/college/2022/12/17/oregon-ducks-cam-mccormick-ninth-year-of-eligibility

What is the record for years of eligibility? Seems like some players just need to hang it up, move on and begin participation in life. Why would a team keep a roster spot for someone this long instead of looking for a new recruit?