New Pitch Uniqueness, Pt. 2: The Slambio (and a Ghost Fork update)

This young season has already introduced us to a few unique offerings. Brent Honeywell Jr. throws a true screwball. Kodai Senga throws a ghost fork. But one fascinating pitch has flown somewhat under the radar: Ian Hamilton’s slambio.
Maybe it’s because of the right-hander’s lack of a pedigree, or his status as a non-roster invitee during spring training. After all, Hamilton is a 27-year-old reliever who struggled through injuries and ineffectiveness over the past four years. At the same time, he looked like a find as recently as 2018, when he pitched to a 1.74 ERA and 2.44 FIP across 51.2 innings between Double- and Triple-A; he even averaged 96.7 mph on his heater in a brief eight-inning callup. The next season, he seemed poised to play an integral part in the White Sox bullpen, but he was struck by a foul ball while rehabbing separate shoulder and head issues stemming from a car accident. His poor luck nearly brought his career to an end, but he finally began to feel back to normal this offseason.
If you didn’t know about Hamilton before, I’ll be the first to tell you that he has been a joy to watch this season, not only because of his unique offering but also his comeback story, parlaying his rediscovered health into a spot in the Yankees’ pen, where he’s found early-season success with a resurgent fastball (averaging 95.4) and the slambio. The latter pitch has been nothing short of excellent thus far: a ludicrous 29.9% swinging-strike rate and worth 3.8 runs, which rank third and tied for fourth, respectively, among the 85 sliders thrown at least 50 times this year (as of Saturday night). The pitch’s unusually high rate of called strikes, 15.6%, given its whiffiness, also places it second among the 85 sliders in CSW%. Read the rest of this entry »