LOS ANGELES -- Once again, just when the Los Angeles Dodgers seem to be gaining some traction, they lose their footing.They lost their second straight game to a struggling NL Central team, going down 6-3 to the Pittsburgh Pirates on Thursday night. The usual culprits cost them late: poor defense and unreliable relief pitching.How it happened: Dan Haren somehow kept the wheels from falling off despite giving up eight hits, many well-struck, over six innings.