Adam Thielen is turning one amazing gesture into two ... the Minnesota Vikings star is now auctioning off his Alex Trebek tribute cleats to raise money for pancreatic cancer research.
The 30-year-old wide receiver rocked the spikes for a game just days after the "Jeopardy!" host died in November -- and the homage was awesome.
One of the cleats featured an image of Trebek with a halo. The other had a painted-on "Jeopardy!" style placard that read, "We Will Miss You, Alex."
Now, Thielen is taking the cool tribute one step further .