Uvalde, Texas - The biggest names in sports from around the country are mourning the loss of lives in the Texas school shooting.

"Devastating. Heartbreaking. Unimaginable," NFL running back Damien Harris tweeted in response to the tragedy of the shooting at Robb Elementary School in Uvalde, Texas, on Tuesday.

Athletes and coaches have come forward to mourn the loss of 19 children and two teachers killed by 18-year-old gunman Salvador Ramos.

Boston Celtics forward Jayson Tatum was among the many voices who shared his support of the victims. Not only is Tatum a rising NBA star, but also a father who has shared many moments with his son at his home court, the TD Garden Arena.

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"Breaks my heart hearing this news, no parent should ever have to lose their child," the 24-year-old tweeted. "Praying for the families of those kids and the teacher … this is devastating."

Some – like Golden State Warriors head coach Steve Kerr, who delivered an emotional response to the Texas shooting – are demanding change and gun law reform.

Others in the sports world took to social media to send love and solidarity to the families and those affected by the devastation.

Among them were Texas' football teams, the Houston Texans and Dallas Cowboys.

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"We are heartbroken by this afternoon’s tragic events in Uvalde as we mourn alongside our neighbors in Texas," the Houston Texans tweeted.

"To the victims, their families and the entire Uvalde community, you are held close to our hearts today and in the weeks to come."

The Cowboys responded similarly.

"The entire Dallas Cowboys organization grieves alongside the community of Uvalde and all of those affected by today’s tragic event," the organization tweeted on Tuesday.

"As we mourn the loss of innocent life, our hearts and prayers are with the victims’ families, loved ones, faculty and staff of Robb Elementary."

Like the nation's biggest players, most in the US are mourning the loss of the victims to the Texas school shooting, and are devestated over the tragedy.