Marc Topkin of The St. Petersburg Times reports that the Rays have designated reliever Winston Abreu for assignment. He also notes that starter Andy Sonnanstine has been demoted to Triple-A Durham, and that Scott Kazmir and Chad Bradford were activated off the disabled list.
Abreu was tremendous in the minors earlier this year, striking out 49 and allowing just 24 baserunners in 32 IP. He appeared in only two games with the big league club after his call up two weeks ago.