Gone from Miami for six months, Vontae Davis continues to cause headaches for at least one former teammate.

Davis, the occasionally troubled former Dolphins cornerback, might or might not have inadvertently outed his friend and pending Miami free agent corner Sean Smith on Wednesday for participating in an NFL no-no: illegal tampering.

Smith and his agent, David Canter, are not allowed to talk contracts with any team other than the Dolphins before March 9.

But Wednesday afternoon, Davis might have given voice to the league’s great unspoken secret (i.e., tampering is rampant).

In the 1 p.m. hour, Davis tweeted: “I seen my dude Sean Smith last night he said he talking to KC him & [Brandon] Flowers will makes [sic] a good Duo.”

With that, he set off a digital feeding frenzy.

In the next two hours, Smith and Canter issued denials, and Davis — the former first-round pick who was traded from the Dolphins to the Colts last August — claimed his Twitter account was hacked.

“I’ve never talked to any other team besides the Miami Dolphins,” Smith wrote. “Yes I talked to Vontae and I told him Al Harris [our former coach] got the job up in KC and that I talked to him a few days ago to tell him congrats. That’s it!”

Smith continued: “Now why he interpreted that as “talking to KC” idk [I don’t know] but there is NOTHING going on! This is ridiculous.”

Said Canter: “[My] clients haven’t ever spoken to teams prior to free agency, so his statement isn’t true.”

The Dolphins, the Chiefs and the NFL declined comment on the matter.

In the past, the league has stripped draft picks from teams guilty of tampering, but it’s relatively rare.

The NFL investigates allegations of tampering, regardless of whether the offended team files a complaint or not.

Ted Crews, a Kansas City spokesman, said as of Wednesday afternoon the team had not been contacted by the league.

Davis and Smith have been friends since 2009, when they broke into the league as two of the Dolphins’ top three draft picks. Maturity has long been a problem for Davis, who once showed up to practice hung over and later infamously begged general manager Jeff Ireland to let him call his grandmother upon learning he had been traded.

Smith has been a starter for most of his four years in the league and, while he had an up-and-down season in 2012, he is one of the top free agents at his position. Smith hopes to get a multiyear contract in the neighborhood of $8 million annually — a price higher than the Dolphins are likely to pay.

The club is not expected to use the franchise tag on Smith either, and the belief is that he will sign elsewhere shortly after the free agency window formally opens March 12.

This means that Smith’s actions will be under scrutiny for the next two weeks, making Davis’ remarks all the more damaging.

When word of what Davis said began to spread, he followed his first tweet by saying: “My Twitter was Hack [sic] I did not see Sean Smith last night!! … WOW hackers do any & Everything!”

Later, Smith was asked how to explain Davis’ explanation.

“Lol He panicked, tried to help,” Smith wrote. “Not the best idea but I appreciate it.”