Royals' Aroldis Chapman: Unavailable Friday with knee issue

Royals manager Matt Quatraro said Chapman was unavailable Friday versus the Rockies because his "knee has been barking," Anne Rogers of MLB.com reports.

Chapman was unavailable to protect a one-run lead in the eighth inning, and Carlos Hernandez (thumb) and Nick Wittgren failed to do so in his stead. It's a little concerning that the knee issue was enough to keep Chapman off the mound after the Royals just had a two-day break, but the southpaw should be considered day-to-day at this time.