The Diamondbacks designated Floro for assignment Sunday.
The right-hander was acquired from the Nationals at the summer trade deadline, but he struggled to a 9.37 ERA, 1.65 WHIP and 8:4 K:BB over 16.1 innings with the Diamondbacks. Floro could elect to become a free agent if he passes through waivers unclaimed, but he won't be eligible for the playoffs with a new team.