Milwaukee ? Kansas City’s deal to acquire volatile outfielder Milton Bradley from Oakland fell through because the Royals were concerned about Bradley’s health.

The Royals had agreed to send minor-league pitcher Leo Nunez to Oakland for Bradley, who was designated for assignment Thursday. Dean Taylor, Kansas City’s assistant general manager, said the deal was scuttled because Bradley hurt his oblique during his last game with the Athletics.

“There was a health concern on our part concerning Milton, and at this point the trade is dead,” Taylor said before Kansas City’s game against Milwaukee on Saturday night.

The Royals said Bradley informed them of the injury.

The A’s have eight days left to trade or release Bradley. Because he has more than three years of major-league service time, Bradley can refuse an assignment to the minor leagues.

Bradley, who agreed to a one-year, $4 million deal with Oakland in the offseason, first was shelved from April 23 to May 10 by a strained left hamstring.