Pellum has been the defensive coordinator over the last two seasons but has been under heavy fire because of the amount of points scored against the Ducks and the total number of yards given up.
Oregon gave up a record 488 points this season and 485.3 yards per game. The amount of points given up shattered the old record set in 1977 when 377 points were scored on Oregon.
Oregon Head Coach Mark Helfrich made the announcement on Monday afternoon regarding the staff changes.
Chinander, a graduate of Iowa, has been on the staff for two years after spending several years as a graduate student on the coaching staff. Chinander was considered one of the team’s best recruiters.
"I want to thank Coach Chinander for his hard work these past two seasons," Helfrich said. "This is a natural progression for him as he's an outstanding young coach."
Pellum completed his 23rd year as an Oregon assistant coach.
"Don is a great man who has helped shape the culture and growth of Oregon Football in several different capacities for nearly 30 years," Helfrich said. "He's committed, as we all are, to being part of the solution to improve the end results on the field."