Seigler is not in the Red Sox's starting lineup against the Angels on Friday, Gabrielle Starr of the Boston Herald reports.
Seigler has faced starting southpaws this season, but he will be on the bench for the beginning of Friday's contest while Romy Gonzalez starts at the keystone and bats sixth against Angels left-hander Reid Detmers. Seigler has gone 12-for-31 (.387) with one steal, four walks, one home run, three RBI and six runs scored over his last nine games.