After a disappointing 2018 campaign, the San Francisco 49ers come into the 2019 season with high hopes of a bounce-back year. In order to do that, however, they will certainly need to make roster changes in free agency. And on Friday, a big decision was made on the defensive line. Per a report, Cassius Marsh is OUT in San Francisco. #49ers have released veteran DE Cassius Marsh, per @mattbarrows. — NFL Update (@MySportsUpdate) March 15, 2019 This release comes after head coach Kyle.