CHICAGO (AP) -- Sammy Sosa and Eric Young each hit solo homers, and Brian Anderson lost for the first time in 19 starts in the Chicago Cubs' 9-4 victory over the slumping Arizona Diamondbacks on Wednesday.

Glenallen Hill, Damon Buford and Mark Grace each added two RBI for the Cubs, whose three-game sweep was their first against the Diamondbacks.

Arizona dropped its fifth straight, its longest losing streak since the team lost eight straight from May 5-13, 1998.

Anderson (5-1) gave up nine runs on 10 hits and four walks over 5 2-3 innings for his first defeat since a 7-5 loss to Seattle on July 19, 1999.

Scott Downs (3-1) won his second consecutive start, giving up three runs -- two earned -- six hits, one walk and three strikeouts over six innings. Todd Van Poppel pitched the final three innings for his second save.

Young hit his fifth home run to lead off the sixth to give the Cubs an 8-3 lead. Sosa followed two batters later with his 18th, a towering shot into the bleacher seats in straightaway center, to chase Anderson.

Sosa, in a controversy with manager Don Baylor, whom the outfielder feels has unfairly criticized his play, also committed a fielding error in the seventh that led to another Diamondbacks run. It was Sosa's third error in four games.

With two outs in the third, Tony Womack scored from second on Young's fielding error to give Arizona a 1-0 lead.

The Cubs sent 11 batters to the plate in a six-run third. With two outs and runners at first and second, Grace hit an RBI double. Sosa was intentionally walked and Hill hit a broken-bat single to drive in two runs to give the Cubs a 3-1 lead. Buford doubled to right, scoring Sosa and Hill, and Buford scored on Willie Greene's double to make it 6-1.

Grace added an RBI single in the fourth.

Gonzalez hit his 14th homer to lead off the Arizona sixth. Matt Williams and Steve Finley each singled, and Williams scored when Greg Colbrunn grounded into a double play.

Notes: Randy Johnson will start Friday for Arizona after missing one start because of tenderness in his left shoulder. ... Anderson had faced 117 consecutive batters without issuing a walk until Grace drew one in the first inning Wednesday. ... This was the Cubs' second sweep. They also took three games against Atlanta April 10-13.