The Royals signed Alfaro to a minor-league contract Monday, Aram Leighton of JustBaseball.com reports.
Alfaro got into 14 games with the Nationals in 2025, slashing .256/.256/.308. The 32-year-old hasn't seen significant action at the major-league level since 2022, and with Salvador Perez and Carter Jensen locked onto the big-league roster, that's unlikely to change in 2026.