The Nationals have signed veteran pinch-hitting specialist Greg Dobbs to a minor-league contract.
As an original member in 1998, a starter on their 2001 World Series team, a former broadcaster and minority owner, Matt Williams has history in Arizona.
Gio Gonzalez gave up seven early runs on Sunday afternoon, part of a rough outing and Washington's 9-1 Mother's Day loss to Oakland.
Today Gio Gonzalez will face his former team for the first time since joining the Nats in a 2011 trade.
The Nats made the announcement officially on Sunday that Adam LaRoche will head to the 15-day disabled list, and revealed Tyler Moore as the corresponding move.