The Kansas City Royals placed starting pitchers Danny Duffy (forearm) and Brady Singer (shoulder) on the 10-day injured list on Tuesday and recalled infielder Ryan McBroom and right-hander Tyler Zuber from Triple-A Omaha in corresponding moves. Duffy is going back on the injured list with a flexor strain, and it likely kills any trade value he might've had just ahead of the deadline. The 32-year-old southpaw has been good when on the mound this year (2.51 ERA, 1.21 WHIP, 65 K's in 61 ...