MIAMI — Rookie Jose Fernandez struck out eight in seven innings, leading the Miami Marlins to a 3-0 win over the Colorado Rockies on Saturday night.

Fernandez (10-5) allowed four hits and did not walk a batter as he lowered his ERA to 2.30. The 21-year-old All-Star has been one of the best pitchers in the Majors since June 1, compiling a 1.52 ERA and 112 strikeouts in 15 starts.

A.J. Ramos pitched the eighth and Steve Cishek earned his 28th save in 30 chances.

Todd Helton had two hits for the Rockies to move into 96th place on the career hit list with 2,496 in 17 seasons, all with Colorado.

Fernandez showed off his youthful exuberance on several plays. First, when he snagged Troy Tulowitzki’s line drive to end the first inning, Fernandez glared at the Rockies All-Star shortstop, who said something to Fernandez. Fernandez flashed a big smile on his way back to the Marlins dugout.

Then in the fifth, Fernandez tried to bunt for a base hit, but third baseman Nolan Arenado barehanded the ball and threw him out at first base. Fernandez thought he was safe and jumped up in a sign of frustration, yelled, and then gave another big smile.

Fernandez grinned broadly after Helton singled in the seventh, which moved him ahead of Mickey Vernon on the hits list. The ball was thrown into the Rockies dugout as a keepsake and Fernandez tipped his cap to Helton.

Giancarlo Stanton led off with a double and scored on an RBI single by Ed Lucas. Adeiny Hechavarria followed with an RBI triple and scored on a sacrifice fly by Jake Marisnick for the 3-0 lead.

Manship allowed three runs in six innings.

Tulowitzki’s season-high 10-game hitting ended with an 0-for-4.

NOTES: Fernandez is likely to have two more starts before the Marlins shut him down for the season. “The date is still roughly going to be early September,” manager Mike Redmond said. … Miami 3B Placido Polanco was expected to field groundballs before the game and could return to the team on Tuesday. … Rockies RHP Roy Oswalt threw a bullpen session before the game. “He had a good day,” Rockies manager Walt Weiss said. “The bullpen went well.” … Colorado LHP Jorge De La Rosa (13-6, 3.21 ERA) will face Miami RHP Jacob Turner (3-4, 3.02 ERA) in the series finale on Sunday.