SAN FRANCISCO -- The Los Angeles Dodgers have a good left-handed reliever, J.P. Howell, but they would prefer to have two.In fact, in their last series against the Arizona Diamondbacks, Dodgers manager Don Mattingly said the lack of a second left-hander made for some uncomfortable managerial decisions.Time is running out, with just 16 games left. But the Dodgers are hoping that two left-handers working their way back from injuries could finally give them the second lefty they've been lacking in the bullpen, both for this month and, perhaps, the playoffs.