The Royals designated Ron Mahay for assignment to make room for Yasuhiko Yabuta, according to Bob Dutton of the Kansas City Star. Mahay, a 38-year-old lefty, has allowed 55 hits and 19 walks in 41.1 innings, striking out 34. The 13-year veteran has allowed nine homers already, which have contributed to his 4.79 ERA. Mahay's in the second year of a two-year $8MM deal that he signed before the 2008 season.