Former Marlin leads blowout

Astros’ Marisnick has fifirst multihomer game of his career.

MIAMI — Unbeaten ace Dallas Keuchel became the first seven-game winner in the majors despite pitching only fifive innings, his shortest outing this season, and the Houston Astros beat the Miami Marlins 12-2 on Tuesday night.

Jake Marisnick tripled his season RBI total to six with a pair of two-run homers against his former team, both caroming offff the home run sculpture at Marlins Park. Brian McCann also had four RBIs.

Keuchel allowed two runs, both in the fifirst inning, and threw 70 pitches before departing with a 10-2 lead. His ERA rose to 1.84.

The Astros (28-12) own the best record in the majors and have won 13 of 16 games.

The last-place Marlins (14-24) are headed the other way, losing 16 of 20. They’re 1-7 on their homestand going into today’s fifinale.

Tom Koehler (1-2) gave up eight runs in three innings, inflflating his ERA to 7.04. Miami went hitless for the fifinal 62/32/3 innings against Keuchel and two relievers, and totaled just four hits.

The Astros used five singles to score three times in the fifirst inning. Koehler issued three consecutive two-out walks in the second, and McCann hit the next pitch for a three-run double.

Marisnick homered in the third and fififth for the fifirst multihomer game of his career, which began