The Globe's Gordon Edes reported Friday that the Red Sox will trade Jay Payton - who was designated for assignment Thursday -- to the A's for veteran reliever Chad Bradford, a submarining righthander who has been on the disabled list since March 22 after a second back surgery. Edes continues: "Bradford, who is currently on rehab assignment, is expected to come off the DL after the All-Star break, which is why the announcement of the trade is pending -- the A's will need to clear a roster spot first. But in the first step toward that deal, the Sox yesterday designated Payton for assignment and called up Rule 5 outfielder Adam Stern from Triple A Pawtucket. Bradford's health makes him a bit of a risk, but when healthy, the 30-year-old seven-year veteran has been an effective setup man." The 6-foot-5 Bradford appeared in 68, 72, and 75 games for the A's in the last three seasons. Bradford's best season came in 2003, when he went 7-4 in 72 games with a 3.04 ERA. Last year, he was 5-6 with a 4.42 ERA in 68 games. The Providence Journal's Sean McAdam writes that Bradford's "sinking fastball generates lots of ground balls, and the Sox believe he can help them in the sixth and seventh innings."