Former 49ers LB Gary Plummer played a lot of football games at the sport's most violent position. So it's not all that shocking to hear that he suffered a lot of concussions during his career. What is shocking is the number Plummer put on it during an appearance on The 49ers Insiders Podcast. Plummer estimated that if he included Grade 1 concussions, often referred to as mild concussions with symptoms that last for about 15 minutes, he suffered about 2,500 during his football career. Via NBC Sports Bay Area: "If you're not getting at least 10 of those a game, as a middle linebacker in the NFL, that means you didn't play that day," Plummer said. "I played 250 games. So (with) at least 10 a game, that's 2,500 concussions." Now, these aren't full blown concussions but they can still lead to long-term brain damage. Plummer says he was motivated to take precautionary measures to prevent the effects of CTE after Junior Seau's suicide.