DENVER -- Nolan Arenado and Charlie Blackmon each hit two of Colorado's team record-tying seven homers, powering the Rockies to a 17-4 win over the Cincinnati Reds on Tuesday night.
Blackmon became the first player in Rockies history to hit leadoff homers in back-to-back games and added his first career grand slam in the seventh. Carlos Gonzalez homered for a fourth straight game, while DJ LeMahieu and Gerardo Parra also went deep.
It was the first time Colorado hit seven homers at Coors Field. The team also had seven on April 5, 1997, in Montreal.
Rockies right-hander Jon Gray (3-2) allowed three runs in six solid innings.
Jon Moscot (0-3) was hit hard in his return from the disabled list. He surrendered seven runs and four homers in two innings. Moscot also was grazed in the right ear in the third while bunting. Moscot stayed down for a moment before taking his base.
Moscot was replaced on the mound in the bottom of the inning. The right-hander was making his first start since April 27 after being sidelined by inflammation in his non-pitching shoulder.
A day after the Reds hit five homers, it was the Rockies' turn to play long ball. They had two homers in a five-run first, two more in the second, another in the third and sixth and finally Blackmon's blast in the seventh.
After that, Cincinnati's relievers kept Colorado inside the park. Still, the team had a franchise-best 14 extra-base hits.
The only late-inning drama was whether Parra or LeMahieu would hit for the cycle. Both finished a triple short.
Blackmon nearly set a new team record for homers in the eighth, but his drive was caught on the warning track in left.
Arenado had his first day off of the season Monday and came back rejuvenated with his third two-homer game this season. He now has 16 homers.
Blackmon is having quite a series, beginning the game on Memorial Day with a homer against Dan Straily and hitting a fastball from Moscot over the fence in right-center.
It was Blackmon's 50th career homer in his 500th game.
Joey Votto and Jay Bruce hit solo homers off Gray in the sixth to make it an 8-3 game. Colorado's pitching staff has now surrendered 10 homers in the last four games.
Reds: RHP Caleb Cotham went on the disabled list with a sore shoulder. ... 2B Brandon Phillips was scratched because of a sore left foot.
Rockies: RHP Adam Ottavino (Tommy John surgery) threw 25 pitches to hitters before the game. "Looked real good," manager Walt Weiss said. ... INF Mark Reynolds received the night off.
Reyes Off To Minors
Rockies shortstop Jose Reyes will begin a rehab assignment Wednesday with Triple-A Albuquerque after completing his suspension for violating Major League Baseball's new domestic violence policy.
Reyes will make his way to Albuquerque after working out at extended spring training in Scottsdale, Arizona. There's no timetable for his return to the Rockies after the 59-day suspension.
Reds: Lefty John Lamb (0-3) searches for his second career win. He earned his first last September against St. Louis.
Rockies: Righty Tyler Chatwood (6-3) makes his sixth start of the season at Coors Field, where he has a 5.10 ERA.