In an appearance on "Any Given Wednesday" with Bill Simmons, Green Bay Packers quarterback Aaron Rodgers talked about -- among other things, like his desire to retire with the Packers -- concussions. Rodgers said that the biggest issue facing the NFL in terms of keeping players safe these days is the players self-monitoring concussions because they always want to stay on the field.

As an example of this, Rodgers told the stories of the two concussions he suffered in his career. The first came in October of 2010 against the Redskins, while the second was in December of 2010 against the Lions.

Here's a partially edited transcript of the exchange about the first concussion:

Rodgers: "I had a bizarre metallic -- one eye went metallic. I could only see out of my right eye."

Simmons: "WHAT?"

Rodgers: "Yeah."

Simmons: "What happened?"

Rodgers: "I got hit. We were playing Washington. I got hit by like three guys on a blitz. London Fletcher came around and he was one of three guys that kind of hit me. Side of the head."

Simmons: "And you lost sight in your left eye?"

Rodgers: "Yeah. It went out -- it was just metallic. It was like a silver metallic in the left side."

HIS EYE WENT METALLIC. I don't even know what that means, but it sounds... not great.

And here's Rodgers on concussion No. 2:

Rodgers: "I got knocked out."

Simmons: "Just out?"

Rodgers: "For a split-second. And then I got up and my chin strap was, like, across my nose and you could see Gene Steratore -- one of my favorite referees -- and he kind of comes over to me and he's like, 'Hey, are you OK?' And I don't remember this, but I'm like, 'Yeah, fine. I'm fine.' So there was a timeout called, went over to the sideline and I think I waved, 'I'm good. I'm good.' That's just kind of what's built into you. Then I went back out there for a couple plays. I didn't know. I couldn't call the plays and we ended up ..."

Simmons: "You couldn't call the plays?"

Rodgers: "I called the play because I was able to recite it from my helmet. The only thing I remember about that sequence was, I was under center and I didn't know if it was a run or a pass. And Mike (McCarthy) and I laugh about this ... It's not funny to play through concussions; it's not safe. I wouldn't recommend it. But we laugh because it was a hard play-fake to the right and I had the post runner wide-open for a touchdown. But I didn't know if it was a run or a pass, so I kind of moved backwards and then held it and got sacked. And then that was it. I came out of the game."

Hey, that also sounds like it was not much fun. Probably because it wasn't. Concussions are serious business. And players not reporting them is even more serious. That's how we wind up with things like Case Keenum stumbling around in the backfield and still not being taken out of the game, because he's fighting for his job. It's dangerous.

The NFL now has concussion spotters out on the field, but it's still partially up to the player himself to report symptoms, and that could always bring up some conflicts of interest.