The Eagles placed Brown on the reserve/retired list Sunday. The word internally was he simply felt it was time for him to step away.
Brown signed a one-year deal with Philadelphia in March that would pay him a base salary of $910,000 and included $550,000 in guarantees. He was in the mix to compete for a starting spot and was at a minimum expected to be a special-teams contributor.
The Eagles already had the least amount of salary-cap dollars committed to the linebacker position for 2020 ($5.9 million), according to Spotrac. The Eagles get about $900,000 in cap relief as a result of Brown retiring.