Manager Dave Martinez said Williams (elbow) will throw to live hitters Saturday, Bobby Blanco of MASNSports.com reports.
Williams has been on the shelf since June 4 with a right flexor strain and has been cleared to throw against hitters. Considering the lengthy layoff, the 32-year-old will likely require a minor-league rehab assignment. It's unclear if he'll have enough time to be stretched out and rejoin the Nationals rotation.