The Dodgers recalled Halvorsen from Triple-A Oklahoma City on Monday.
Acquired from the Rockies in a trade last month, Halvorsen logged 6.1 scoreless innings with an 8:2 K:BB with Oklahoma City to earn a promotion. He holds a 4.91 ERA and 53:36 K:BB over 58.2 frames in the majors across the last two seasons, but Halvorsen has a big arm and the Dodgers will aim to coax more consistency out of him.