KANSAS CITY -- Chalk this one up as another learning experience for Royals rookie right-hander Brad Keller.
Keller clearly didn't have his best stuff or command on Tuesday against the Cubs, but he reached deep and grinded out six serviceable innings in a 5-0 loss at Kauffman Stadium.
The Royals have lost six straight.
The Cubs jumped on Keller in the first inning, beating him twice on sliders and once on a changeup as Javier Baez singled, Ben Zobrist doubled and David Bote tripled for a 2-0 lead.