The Twins have returned Rule 5 selection Erik Komatsu to the Nationals, Adam Kilgore of the Washington Post reports (on Twitter). The Twins designated the outfielder for assignment two days ago after claiming him from the Cardinals. The Nationals confirmed the move and noted that Komatsu will be assigned outright to Triple-A (Twitter link).
The Cardinals selected Komatsu from the Nationals in last winter's Rule 5 draft. Komatsu appeared in 30 total games this year, playing all three outfield positions and posting a .216/.293/.216 batting line. He has a .302/.389/.434 line in four seasons as a minor leaguer.