“The blade anchor of the MP-20 family, with a copper underlay shared across all four MP-20 models for a softer feel. Rung-4.”
The MP-20 MB is the pure muscleback blade anchor of Mizuno's 2020 MP-20 family, a one-piece forged 1025E head with the traditional compact profile, thin topline and minimal offset a blade demands. Its distinguishing 2020 feature is a copper underlay laid beneath the nickel-chrome finish, a technique Mizuno first used decades earlier on irons like the MP-29 and TN-87, revived across the whole MP-20 line to soften the impact sensation. It carries traditional (weak by modern standards) lofts, 49 degrees at the pitching wedge and 35 at the 7-iron, prioritizing trajectory control and stopping power over distance. As the final iron to wear the historic 'MP' badge before Mizuno's 'Mizuno Pro' rebrand, it is the last of a lineage of MP blades stretching back through the MP-4, MP-69 and MP-33.
A revered-shape modern Mizuno blade with genuine following among low handicaps and a place in a storied MP blade lineage, and its status as the last-ever 'MP'-badged set gives it a small end-of-era significance. But it is plentiful, recent and carries no scarcity premium; it is respected and desirable to a niche audience rather than a cult set that people hunt down.
For skilled, low-handicap ball-strikers (roughly 0-6) with the consistency and clubhead speed to launch a weak-lofted blade and the desire to shape shots. The reward is unmatched feel and workability. Anyone outside that band, mid-to-high handicaps, moderate speeds, players seeking forgiveness or distance, should not buy it; the MP-20 MMC, HMB or a game-improvement iron will be far kinder.
Launched 2020 as the blade of the MP-20 trio (MB, MMC, HMB) and the last set to carry Mizuno's 'MP' name before the 2021-22 rebrand to 'Mizuno Pro,' whose 221 blade is its direct successor. It continues the MP muscleback lineage (MP-33, MP-69, MP-4, MP-5, MP-18 MB). Its traditional lofts mean it flies shorter and lands softer than modern jacked-loft players' irons.
A pure one-piece muscleback blade, among the least forgiving iron types made, scored near the bottom of the catalog. There is no perimeter weighting, no cavity, minimal offset and a thin sole; the sweet spot is small and mis-hits are punished immediately with lost distance and a firmer, telling feel. The copper underlay softens the sensation of a good strike but does nothing for forgiveness. A 2 is correct for a modern players' blade; only a raw or older blade would sit lower.
Calibrated across the whole catalog — a tour blade scores low here on purpose; it means control, not ease.
Traded on SidelineSwap, 2nd Swing and eBay; realistic private-party value in 2026 is roughly $400-650 for a clean steel set, holding relatively well for a blade because of steady feel-chaser demand and its last-MP-badge status, with premium shafts pushing higher and worn/rusted sets lower. Reconditioned-retail store listings read higher and are warranty-inflated. Original retail was around $1,150.
The Legends Rack
The modern chapter of the same religion, with copper underlay in the MP-20 for extra myth. Who'll love it: better players bridging classic feel and modern shaping.
Who it suitsBetter players
Reading is one thing — hitting is another. Book a bay and see the numbers for yourself before you buy anywhere.
