Ryu hasn't allowed a baserunner and has struck out seven. Even more remarkable, just three Cincinnati batters have hit the ball out of the infield.
Ryu had a 3.00 ERA coming into Monday and had struck out 40 batters and walked just 12 in 45 innings pitched. The left-hander excelled as a rookie for Los Angeles after signing a six-year, $36 million deal with the Dodgers in the winter of 2012.
MLB's last perfect game came in 2012 when Felix Hernandez didn't allow a baserunner against the Rays. Sandy Koufax threw the first and only perfect game in Dodgers history on Sept. 9, 1965.