Regression Has Come for Hyun-Jin Ryu
When Hyun-Jin Ryu takes the hill tonight against the Rockies in Los Angeles, he’ll be looking to reverse the fortunes he’s faced over his last three outings.
Ryu started the year hot. In his first 22 outings this season, Ryu’s 1.45 ERA led baseball by a healthy margin. No one could beat him; Ryu allowed two or fewer earned runs in 21 of his first 22 starts, and his ERA would have been even lower (read: 1.04) if it weren’t for one disastrous outing at Coors Field on June 28.
Despite this sparkling start to his 2019 campaign, Ryu found himself in the midst of a two-man race for the National League Cy Young Award. At the time, Ryu’s ERA — while certainly outstanding in a vacuum — appeared quite dependent on defense and luck. On the morning of August 12, after he completed seven innings of shutout ball against the Diamondbacks, Ryu’s ERA sat at the aforementioned 1.45 figure (34 ERA-). His FIP of 2.86 (65 FIP-) was still excellent, but it remained a far cry from the dominance we had witnessed on the scoreboard. In fact, at the time, Ryu’s ERA-FIP differential of -1.40 runs was the second-lowest in baseball. An ERA that low just wasn’t possible to sustain. Read the rest of this entry »