Jones threw his changeup only six times this year, which is not out of the ordinary as he’s never thrown it more than 2% of the time since 2014. He’s allowed only two hits with it in that same timespan, so the low usage is not necessarily because of any struggles.
The slider is Jones’ go-to breaking pitch, throwing it at least 33% of the time of the past five seasons. This was the first season he’s allowed a batting average over .200, and by quite a lot, as the line sat at .273 by the end of the season. This can be attributed to his inability, relative to previous seasons, to get batters to chase it outsize of the zone, seeing his O-Swing rate drop to 28% after being over 35% the previous four seasons.
The sinker is Jones’ primary pitch, and he gets it up in the high-90s with plenty of movement. Hitters actually fared pretty well against it in 2018, partly due to a .306 BABIP.
Jones throws the slider about a third of the time. While it underperformed in 2018, that’s only because it had been incredible in previous years. Allowing a 71 wRC+ is great, but it was a career low for Jones.
Jones threw fewer than a dozen changeups last season, well behind his sinker and slider in terms of usage. Even at 89 mph, it moves plenty—Jones just doesn’t use it much.