The crafty lefty has done nothing but dominate since signing with the O’s as the 74th overall pick in 2017. He coasted through two A-Ball stops last year, picking up where he left off last weekend in his Double-A debut. Lowther held Harrisburg scoreless for five innings, striking out six and allowing just two hits with two walks.
Lowther’s fastball plays way above its 87-to-90 mph velocity because of his command and late movement. A high-spin pitch, the heater finishes with plus ride that induces a surprising amount of swinging strikes for someone working with such limited velocity. He repeats a clean delivery well, pounding the zone and able to spot his fastball to the lower-third on both sides of the plate. Lowther can change the shape of his breaking ball—having shown a true slider on top of his curveball in the past—but favored the mid-70s hook in this look. It’s a shapely pitch with consistent two-plane depth, especially tough for lefties to stay in on due to its long diagonal tilt across the zone. He doesn’t use his changeup as much as you’d expect for a soft-tosser, but it’s an effective third speed that projects as an average offering. Lowther tunnels both secondaries well off his fastball, giving both pitches extra deception.
While unorthodox, Lowther is a testament to how changing speeds, hitting spots, and keeping hitters off-balance can be every bit as effective as traditional plus stuff—especially from the left-hand side. He has pitched his way near the top of Baltimore’s top prospect list, now looking like a potential back-rotation starter that has some chance to reach the big leagues by next year.