Richard Sherman is not the player he once was, but that hardly means his voice carries no weight in the football world.

The four-time Pro Bowler published a scathing critique of the NFL's concussion policy in the San Francisco Chronicle on Monday, pushing back on the notion that the league is putting concerns about the health and safety of its players ahead of its own self-serving interests.

Sherman took special umbrage at the recent dismissal of longtime sporstcaster Bob Costas removed from Super Bowl coverage leading up to the championship game in wake of his remarks about concussions.

“Earlier this month, sportscasting legend Bob Costas revealed NBC pulled him from Super Bowl coverage a week before the big game last year for comments about concussions and player safety. This revelation demonstrates, once again, the disregard for player safety,” he writes.

The San Francisco 49ers quarterback relays statistics like 99 percent of brains donated to Boston University by former NFL players being afflicted with chronic traumatic encephalopathy, and casts doubt on the league's finding that concussions decreased by 23.8 percent in 2018.

Sherman uses one especially infamous incident to highlight the need for further reform related to concussions, too.

“It was a year ago December that then-Texans quarterback Tom Savage was sent back into the Texans-49ers game even though a replay showed he had obvious concussion symptoms. When asked my opinion on the NFL’s concussion protocol, I replied that it was an “absolute joke” and something “done only for public opinion.”

Sherman, 30, had 37 tackles in 14 games for the 49ers last season, failing to record an interception for the first time in his career.