Deion Sanders is one of the most respected names in NFL history.
He was a two-time Super Bowl champion, winning Super Bowl 29 with the San Francisco 49ers and Super Bowl 30 with the Dallas Cowboys.
"Primetime" went to the Pro Bowl eight times and was a six-time first-team All-Pro, winning the NFL's Defensive Player of the Year award in 1994.
He finished his career with 53 interceptions, 10 defensive touchdowns and nine return touchdowns, making him one of the best cornerbacks in the league's history.
Sanders has since gone on to earn respect off the field too. He went into the Pro Football Hall of Fame in 2011 and now works as an analyst for CBS Sports and the NFL Network.
His opinion, therefore, is often on-point. However, in a recent Twitter exchange with Kevin Byard, Sanders showed that he doesn't always get it right.
The NFL Network's official account tweeted to say that Sanders had picked Tyrann Mathieu, who's recently joined the Houston Texans, as the best safety in the game.
That opinion didn't sit very well with Byard, who responded by saying: "How do you make this statement and not include the two first-team AP All Pro safeties?"
The Tennessee Titans DB makes a very good point, but Sanders clearly doesn't like being argued with and replied to Byard.
However, it was in rather embarrassing fashion. It appears the Hall-of-Famer doesn't know who Byard is - and mistook his opinion for that of a fan.
"You're looking at who writers tell u who's the best I know who players and former players feel is the best. I rest my case. You continue to be a fan and i will continue being the man. #Truth," he wrote.
Ouch. That's pretty disrespectful and naturally, 24-year-old Byard, who went to the Pro Bowl this year, hit back.
He explained that as a current player, he watches a "ton" of tape and suggested that Sanders shouldn't be overlooking the likes of Harrison Smith, Earl Thomas and Eric Berry.
There was no coming back from that - and Sanders couldn't even take the time to reply to those tweets or even apologise.
He did though, tweet this shortly after:
"Stop allowing nobody to become somebody because u gave them a stage. A Nobody needs your attention to become a somebody. The best gift I’ve ever given is the gift of IGNORE! Trust me it’s precious & they will never forget it. #Truth."
It's not clear whether that tweet was in reference to his run-in with Byard - hopefully it wasn't.
Sanders had already disrespected Byard by mistaking him for a fan, so referring to him as a "nobody" as well would be beyond ridiculous.
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