Why do baseball teams rub mud on the balls?
Hyun Jin Ryu - Toronto Blue Jays Starting Pitcher - ESPN
Ryu dominates in Bisons victory
Hyun-Jin Ryu agrees to four-year, $80M contract with Toronto Blue Jays
Hyun Jin Ryu logs 6 scoreless frames in Blue Jays' win
Sportsnet - Blair & Barker
Spawn
Blue Jays: Despite struggles, Ryu still a valuable member of the rotation
Hyun Jin Ryu logs 6 scoreless frames in Blue Jays' win
Hyun Jin Ryu allowed two earned runs over six innings in rehab start with Triple-A Buffalo - BlueJaysNation