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Rockies prospects German Marquez, Jordan Patterson and Pat Valaika promoted to majors

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The Rockies will have to make a couple of 40-man roster moves to accommodate the new additions.

The Colorado Rockies on Tuesday will promote prospects German MarquezJordan Patterson and Pat Valaika to the majors, multiple sources have told Purple Row.

Marquez, acquired by Colorado in the offseason trade that sent Corey Dickerson and Kevin Padlo to the Tampa Bay Rays and Jake McGee to Denver, had a breakout season at Double-A Hartford and Triple-A Albuquerque. The 21-year-old right-hander posted a 3.13 ERA in 166⅔ total innings, striking out 155 batters while walking only 39. Marquez handled his promotion to the hitter-friendly PCL well, with 29 strikeouts and six walks in 31 frames.

Patterson, who has spent time at first base and in the outfield this season at  Albuquerque, hit .293/.376/.480 in 495 plate appearances. He drew 47 free passes -- nearly a 10 percent walk rate -- but wound up striking out 118 times after a solid start to the season in that area. Still, the 24-year-old Alabama native provides pop, versatility and above-average speed from the left side.

Valaika, 23, hit .257/.295/.425 in 495 plate appearances between Double-A and Triple-A while playing three different infield positions. The 2013 ninth rounder struggled offensively after being moved up to the Isotopes, posting a .553 OPS and drawing just two walks while striking out 28 times in 115 trips to the plate. But Valaika is a sound defender and, big picture, has shown the ability to hold his own at the plate despite facing older competition at most levels.

The Rockies will have to make a couple of corresponding moves to accommodate the additions of Patterson and Valaika to the 40-man roster, which already includes Marquez. Transferring Trevor Story to the 60-day disabled list is one option, but there are several fringy players who are DFA candidates, including Rafael Ynoa and Ben Paulsen.

UPDATE: The Rockies did, in fact, designate Ynoa and Paulsen for assignment to make room for Patterson and Valaika.