Nick Cafardo of the Boston Globe reports that the Pirates and Red Sox are among the teams interested in Padres' reliever Luke Gregerson. ESPN's Jayson Stark reported earlier today that the Padres are more likely to move Joe Thatcher than Gregerson, but that hasn't stopped teams from trying. The 29-year-old has a 2.91 ERA and 39/9 K/BB ratio over 43 1/3 innings this season. He remains under team control through 2014.