The Mississippi Braves got a boost today when Eric Duncan was activated from the disabled list. Arguably the club’s best hitter, Duncan is expected to be in the lineup at second base tonight when the M-Braves take on Mobile at Trustmark Park. He has been out since June 12 with a wrist sprain. … This might be good news for Nettleton’s Bill Hall, but it’s bad for Red Sox Nation. Boston’s Dustin Pedroia has gone on the DL with a broken foot. Hall was in the lineup as his replacement today. Hall can hit a little, though he’s not in Pedroia’s league. But here’s the more glaring difference: In 548 games at second base, Pedroia has a .991 fielding percentage with just 23 errors. Hall, whose best position is batter, has a .959 percentage with 19 errors in 110 games at second. Boston likely can’t play him there for an extended period.