On August 19, 2019, the Rockies placed Oberg on the 60-day disabled list due to problems with blood clots in his arms, ending his season.
Before the 2020 season began, Oberg was put on the 45-day disabled list due to blood clots in his right arm, ending his season early and preventing him from playing.
On March 26, 2021, Oberg underwent his third procedure to address blood clots, which involved removing them from his pitching elbow. After the surgery, Oberg was put on the 60-day injured list on March 27 and his career was in danger.
From 2009 to 2012, Oberg represented the Huskies in college baseball at the University of Connecticut. He participated in the Cape Cod Baseball League’s Bourne Braves’ collegiate summer baseball program in 2009.
In the fifteenth round of the 2012 Major League Baseball draft, the Colorado Rockies selected Oberg. He signed with the Rockies and made his career debut with the Grand Junction Rockies after signing them.
He participated in 2013 with the Modesto Nuts. Oberg played in just 27 games as a pitcher for the Double-A Tulsa Drillers in 2014.
Oberg played in 66 games for the Rockies in 2017 and recorded a career-high in strikeouts while posting an ERA under 5.00 for the first time in his career (4.94). (55)