A bunch of eyewitness sightings claiming to have seen the Chiefs tight end in Sin City early this week ended up being spot on -- 'cause a shot of him on a golf course at the Wynn Golf & County Club popped up on social media Tuesday ... sure enough, there's the homeboy.

A couple good friends of Travis' -- who are constantly posting and hanging around him -- also documented their time in Vegas Monday ... and it appears TK was rolling with his buds.

They hit up this restaurant called Toca Madera -- and the DJ who plays there also name-dropped Trav on his social media ... saying he'd heard the guy was recently in the house.

The DJ, Adam Daudier, wrote ... "apparently Travis Kelce was getting down to my music in the private room last night & management asked me to play a private event for the Kansas City Chiefs this Friday."

He adds, "*brain is still processing, that sentence doesn't even feel real."

Assuming what this guy's saying is accurate ... it appears the Chiefs at large might be coming back to Vegas to enjoy themselves later this week -- which, after everything they've gone through of late, is probably well-deserved. It's been a hectic past several days.

Of course, we're referring to the Kansas City shooting that happened last Wednesday during the Chiefs victory rally ... which left one woman dead and nearly two dozen others injured.

The tragedy rocked the city, and the team as well ... Travis and others have donated a lot of money in the aftermath, and just the other day -- he and his brother, Jason, urged others to chip in even more if they could ... as there's still a lot of victims recovering at this time.

Safe to say, it's a stressful time ... and on its face, Travis was out there in Vegas blowing off some steam -- and presumably trying to keep his mind off the chaos of everything lately.

As for his girlfriend, Taylor Swift, she's now in Sydney to continue on with her 'Eras' tour.

We know she's got her show opener, Sabrina Carpenter, there to keep her company currently -- but yes, the Chiefs are still very much so top of mind for Tay Tay too ... evidenced in the fact she was rockin' their gear the other day as she flew into the next Australian city.

Unclear if Trav is gonna join her out there at some point -- we know he expressed an interest ahead of his Super Bowl ... but at the moment, no sign of any solid travel plans.