'슈퍼 루키' 김서현, 데뷔전서 157.9㎞ 강속구 / YTN YTN 0 106 2023.04.20 00:45 https://www.youtube.com/watch?v=l0x8hA7BWLo + 14 https://www.youtube.com/feeds/videos.xml?channel_id=UChlgI3UHCOnwUGzWz… + 18 '슈퍼 루키' 김서현, 데뷔전서 157.9㎞ 강속구 / YTN