Arteaga cleared waivers and was outrighted to Triple-A Rochester on Tuesday, freelance baseball writer Byron Kerr reports.
Arteaga was designated for assignment by the Nationals on Saturday, Mark Zuckerman of MASNSports.com reports.
Arteaga signed a minor-league contract with Washington in early February, Jesse Dougherty of The Washington Post reports.
Arteaga was released by the Royals on Sunday.
Arteaga will be a part of the Royals' 60-man player pool this season, Enrique Rojas of ESPN Deportes reports.
Arteaga signed a minor-league contract with the Royals on Tuesday.
Arteaga was non-tendered by the Royals on Monday, Lynn Worthy of The Kansas City Star reports.
Arteaga is out of the lineup for Monday's game against the Athletics.
Arteaga is out of the lineup for Sunday's game against the Indians.
Arteaga is not starting Thursday against the Indians.