"It's been rough," Stanley said Wednesday. "Just trying to check in on my family and loved ones and close friends back home was kind of overwhelming."
Sunday's mass shooting on the Las Vegas Strip has left at least 59 people dead and more than 500 injured.
That touched close to home for Stanley. He grew up in Las Vegas and was considered the top football prospect in Nevada when he graduated from high school there five years ago.
"It's just another reminder that there is a world outside of football and a world outside of everything that we have going on in our lives," Stanley said.
On his Instagram on Monday, Stanley posted this:
Can't believe what I'm seeing from my hometown. Please pray for the countless lives affected by this act of terrorism. According to most people now I should just focus on football and not care about what's going on off the field right?! No..I will continue to not let being an athlete define me and continue to care about the bigger picture which most people are too scared to even look at. #prayforlasvegas #prayforhumanity