The Red Sox signed pitcher Fabio Castro, tweets Ken Rosenthal of FOX Sports. Castro, 25 in January, posted a 4.01 ERA in 29 starts in the Blue Jays organization between Double and Triple A, with a 5.8 K/9 and 3.7 BB/9. He's bounced around in the Phillies, Rangers, and White Sox organizations, last pitching in the bigs in '07.
Earlier today Nick Cafardo of the Boston Globe noted that the Sox re-upped Kason Gabbard, who they'd reacquired from Texas in April.
