One of Oregon's 2016 signees wasn't able to make an impact for Oregon. After being injured for most of Fall camp, College of San Mateo (Calif.) defensive tackle Ratu Mafileo takes a medical retirement.

Mafileo has been sidelined with a back injury that will end his career.

On Thursday Mark Helfrich confirmed the news with media, including our own Matt Prehm who was present.

"Ratu has had to medically retire," Helfrich told reporters.

On Tuesday DuckTerritory reported this move was expected to be announced soon in our Inside Read update.

The one-time Texas A&M commit decided to switch his commitment to Oregon Aug. 2.

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