After being undrafted out of high school, he continued to play baseball at Dongguk University.
He helped his team win the KBO's Flag National Collegiate Championship, and was named MVP and best pitcher of the tournament.
No made his KBO league debut against the Samsung Lions on April 5, 2013, as a starting pitcher.
After the game he was sent to the bullpen but never fully recovered, posting a +10.00 ERA through the first two months of the season.
No was called up to the first team again in late June and appeared in eight games as a relief pitcher before he made his second start for the Dinos on July 26, giving up three runs in five innings.