Ryu Joong-il (born April 28, 1963) is a former South Korean baseball player who is currently a former manager of the LG Twins of the KBO League. Ryu had a 30-year association with the Samsung Lions, from 1987 to 2016, starting as a player, then as a junior coach, a regular coach, and finally as the team's manager. As the Lions' manager from 2011 to 2016, he led the team to the Korean Series five straight times (2011–2015), winning the championship four times (2011, 2012, 2013, 2014) and finishing second once (2015).