Setting Reasonable Expectations for Kohei Arihara
On Christmas, while I was some combination of calorically comatose and consumed by basketball, Ken Rosenthal of The Athletic reported that the Rangers had signed 28-year-old Japanese righty Kohei Arihara. The move continued an active Texas offseason and streak of curious, perhaps antithetical acquisitions made by a Rangers club that seems to have one foot in rebuilding and and the other in competing. What does Arihara bring to the table right now, and how does his acquisition fit as part of a broader shift in the strategy the org seems to be taking to team building?
Before I talk about Arihara, let’s remember the things that change when a pitcher goes from NPB (Nippon Professional Baseball) to MLB. In addition to the leap in hitter quality, there is also a heavier workload. Pacific League pitchers start once a week rather than once every five days as they typically do in MLB. It’s a strange cultural workload reversal from high school, where Japanese pitchers can be sometimes driven into the ground and asked to throw upwards of 120 pitches on little rest during important tournaments. There’s no way of knowing what kind of long-term consequences this has for the pitchers being developed there, good or bad.
The baseball itself is also different. The tackiness and seam height of NPB’s ball differs from MLB’s (there’s also variance within each population on its own), and those attributes play an important role in creating movement on pitches. This is why, more and more often, you’ll see MLB pitchers asking the umpire for a new baseball after feeling the seams on the one they’ve just been given and realizing they are lower than they like. All of these things, in addition to the complexities of a cross-planet move and cultural adjustment, play a role in augmenting teams’ understanding of the pitchers they have scouted, via tech and eyeball evaluators, in NPB or any other foreign league. Read the rest of this entry »