'슈퍼 루키' 김서현, 데뷔전서 157.9㎞ 강속구 / YTN YTN 0 111 2023.04.20 00:45 https://www.youtube.com/watch?v=l0x8hA7BWLo + 15 https://www.youtube.com/feeds/videos.xml?channel_id=UChlgI3UHCOnwUGzWz… + 19 '슈퍼 루키' 김서현, 데뷔전서 157.9㎞ 강속구 / YTN