NCT Jaehyun's bowling segment recorded the highest viewer rating on the first day of '2019 Idol Star Athletics Championship (ISAC).' 

According to Nielsen Korea, the '2019 ISAC' aired on February 5 recorded an average of 6.4% in viewer rating. The scene with the highest viewer rating revealed to be Jaehyun's bowling segment, which hit up to 7.2%.

Jaehyun, who has just started bowling 3 weeks ago, amazed viewers by having 6 consecutive strikes and ultimately recording the highest bowling score in 'ISAC' history with a score of 243. 

In the finals, he lost to EXO's Chanyeol but still left behind an impressive record and took home the silver medal.