MKNX is a data-driven baseball pitching development platform designed to help pitchers improve velocity while supporting arm health. Built on more than 30 years of pitching instruction from Mark Sheehan, the system combines six areas: arm health, mechanics, strength, nutrition, velocity, and pitch IQ. Its plans use weekly ArmCare exams, uploaded pitching videos, and training information to tailor workouts and adjust guidance over time.

Through the MKNX app, pitchers can access AI-powered mechanics analysis, arm workload tracking, strength programming, weighted-ball and weight-room plans, nutrition targets, pitch sequencing, and schedules organized around their season. The platform also includes progress goals and alerts intended to help users recognize when to ease off. Coaches can review pitcher film, readiness, workload, and mechanical trends across a roster, while teams and programs can provide individualized plans and ArmCare subscriptions to their players.

MKNX reports experience with more than 40 professional and minor-league players and says its pitchers have earned over 600 college scholarships.