Why would it only get a 54 Movement rating?
He gave up only 2 homers in 60.2 innings, and in a season where home runs were hit at a record rate. He generated more ground outs than fly outs by a 47.9% to 34.7% margin.
He throws a splitter 41.9% of the time and it has the 4th best movement among all splitters in the majors:
https://baseballsavant.mlb.com/leade...6&sortDir=desc
Considering all of that, where is the 54 rating coming from? What stat(s) are being converted in to a 54 from his 2019 season?