According to David Hickey, president of the union that represents the hotel's security guards, Campos was hit by one of those rounds in his upper right thigh, a miracle, as Paddock reportedly fired as many as 200 rounds in the security guard's direction.
The security guard, identified as Jesus Campos by the International Union, Security, Police and Fire Professionals of America, was shot in the leg after Paddock fired at him through a door, police said.
While down and injured, Campos radioed his whereabouts and the location of Paddock.
When Stephen Paddock began his shooting spree at the Route 91 Harvest Festival on Sunday, a security guard sprang into action - even though he didn't have a gun of his own.
Lombardo said the guard's "bravery was amazing" when confronted with the prospect of coming face-to-face with the killer behind the most deadly shooting in USA history. The shooter killed 58 people and the attack left almost 500 concertgoers wounded.
The aftermath of Sunday night's Las Vegas shooting has brought out stories of human tragedy, but also breathtaking human heroism.
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At least 23 guns - 12 of which were equipped with bump-stocks, or rapid fire devices - were found inside Paddock's hotel room. He jumped in a vehicle and drove 9 miles to the Mandalay Bay Hotel and Casino, he said in the " 60 Minutes " interview.
Reached by phone Wednesday night, Campos told ABC News, "I'm fine". Paddock was found dead inside the room from a self-inflicted gunshot wound.
The guard who found the shooter and helped bring the massacre to an end said, "I was just doing my job".
"Anyone of us could have been in the position he was in".
Mr Trump said: "He did a good job, didn't he?"
"His bravery was awesome because he remained with our officers, providing them the key pass to access the door and continued to help them clear rooms until our officers demanded he seek medical attention", Lombardo continued. He did a good job. "He did the right thing", the president said. "Funds will be used to provide relief and financial support for him while he gets back on his feet", Rodriguez wrote.
The motive for this mass shooting is still not known but the police have maintained that it was all "obviously premeditated".