This is Harris, a senior at Pine Crest High in Florida.
And this is his adorable 13-year-old brother, Michael.
They're both athletes, and Harris even won the title of Lacrosse Magazine's 2012 South Region Player of the Year.
Michael's an impressive athlete too, especially because in 2008, he became a quadruple amputee after a serious bacterial infection.
In spite of Michael's challenges, he's still won awards for his athletic accomplishments and "doesn't let anything stop him."
Michael's recovery and prostheses couldn't have happened without the support of his community.
Which is why when the Boston Marathon bombings occurred, the brothers wanted to help the 14 victims who lost limbs.
They're doing that through Mikey's Run, a website where you can help to sponsor Harris as he runs in the 2014 Boston Marathon.
Mikey will be there supporting his older brother as he runs, and all money donated will go directly to providing assistance and prosthesis to the Boston bombing victims.
Their goal is to reach $1 million dollars for the victims, but they need some help getting there.
Interested in donating to Mikey's Run?
That means you're an awesome person, congrats! Check out the website, and the best part is that you can donate as much or as litte as you want, but every penny counts towards getting these amputees back in running shape.