Mazya is improving, and his arrow is currently pointed up, with a future as a semi-power-pitcher’s profile that could play well in a realistic role of a middle reliever out of the bullpen. Throwing more quality strikeouts this year than in my past season’s viewings, and though a small sample size, his control has improved, with his 2017 BB/9 falling to a below-average 3.4-per-nine innings from a well-bellow average 4.2 BB/9 last year. He should settle in settle in with fringe-average control at maturity.
The fastball velocity will run up to double-plus territory at 95 mph, but he settles in more in the above-average to plus range (93-to-94 mph) on most occasions. He can get the fastball going with some run and tail, and with sink action to both sides of the plate with above-average movement. The command can be fringy at times, but it has a sense of effective wildness to it in its use. His slider is average, sitting 83-to-86 mph and its shows short, quick tilt and depth in one version, while he’s able to dial up a slurvy version to keep hitters off-balance, and throwing harder back-foot version into righties on occasion.
Mayza shows equal effectiveness versus both righties and lefties. He’s never going to be a command/control type of reliever, but he has in his possession enough stuff and pitchability to throw enough quality strikes – and use his effectively wild side to his advantage – to have a realistic role of a Role 40 major league middle reliever, capable of pitching the sixth and seventh innings perhaps as soon as this season, when roster’s expand in September.