Jessica Donati writes the U.S. could provide an extra 1,000 soldiers under its current commitment.
The U.S. would prepare the additional number of soldiers as combat troops of NATO allies are set to leave Afghanistan by the end of this year, according to the report.
Reuters reports the extra troops would train and advise Afghan forces on the Resolute Support mission.
President Barack Obama has said the U.S. would reduce the number of troops to 9,800 by the end of 2015, Donati reports.