Rookie running back Brian Robinson Jr sustained "non-life-threatening injuries" during an attempted armed robbery or carjacking, the Washington Commanders confirmed on Sunday.

According to widespread reports, local police in Washington said the 23-year-old had been the victim of a shooting.

The Commanders posted a statement on Twitter confirming he was receiving treatment in hospital, but that his injuries were not a threat to his life.

"We have been made aware that Brian Robinson Jr was the victim of an attempted armed robbery or carjacking in Washington, D.C," the statement read.

"He sustained non-life-threatening injuries and is currently being treated at the hospital, where team officials are on-site with him. We ask that you please respect Brian's privacy at this time."

Robinson had impressed to the point where he appeared to have made himself a starter ahead of the new NFL season, playing in two preseason games earlier this month, recording 14 carries for 57 yards and scoring one touchdown.

Commanders coach Ron Rivera was among those who visited Robinson in hospital, and he also provided an update on social media.

"I just got done visiting with Brian. He is in good spirits and wanted me to thank everyone for their kind words, prayers and support," Rivera wrote.

"He wants his teammates to know he appreciates them all for reaching out and he loves them all and will be back soon doing what he does best."