On Wednesday, The New York Times reported Tim Tebow was slated to speak at the Republican National Convention. Now the Heisman-winning quarterback says that's just hearsay.

"I wake up this morning to find out that I'm speaking at the Republican National Convention. It's amazing how fast rumors fly. And that's exactly what it is: a rumor," Tebow said in an Instagram video.

Before Tebow posted that video, Instagram users blasted him over his alleged political leanings.

In June, presumptive GOP presidential nominee Donald Trump said an entire night of the convention might be dedicated to famous athletes speaking on his behalf. Now it's tough to nail down exactly which, if any, sports stars will attend.

So far, the only athletics-related speaker who's confirmed they'll speak at the convention is UFC President Dana White.

Bloomberg reported boxer Mike Tyson might give a speech, which Trump denied. Patriots quarterback Tom Brady said he was a friend of Trump's, but ESPN's Adam Schefter reported Brady won't be speaking, either.

Lots of major Republican politicians have passed on not only speaking at the convention but attending it altogether. Notable figures like Trey Gowdy, Sarah Palin and Marco Rubio will all be absent when the convention kicks off on July 18.