CINCINNATI (AP) — Kazuo Matsui sparked Houston’s seven-run rally with a two-run single, and the Astros coasted to their fourth straight victory Wednesday night, 9-3 over the unsettled Cincinnati Reds.

Houston has won four in a row for the first time since last May, getting 36 runs out of a lineup producing top-to-bottom.

Ken Griffey Jr. hit his 597th career homer off Chris Sampson (1-2), the only bright moment for the struggling Reds, who changed general managers before the game. Walt Jocketty took over for Wayne Krivsky, a show of impatience by team owner Bob Castellini.