Y13 is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Former NBA star Yoon Young-jae, who was out of the season due to an unexpected accident. An unexpected opportunity brings him back to the past.......I dream of taking a powerful leap forward once again in the NBA, where there are top stars!