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By Bat Digest | Last Updated November 17, 2022
The 2018 Mizuno Covert is a two piece hybrid bat in its third year of production. The baseball bat’s first year, it ran under the name NightHawk. In 2017, it was referred to as the Covert.
And now, for 2018, the bat keeps its name and its entire structure. The only noticeable upgrade from last year to this is the paint job. And, some might argue, that isn’t much of an upgrade either. Here is our 2018 Mizuno Covert Review
We think the Covert a mid to top end bat. It lacks the barrel size we’d like to see on a hybrid, but the two piece connection makes for a good smash. The swing weight is nice and balanced and the number of size options for 2018 (drop 10, 9, USABat and BBCOR) give many players some legit options. If you can find the 2017 version in your size, don’t hesitate either.
The idea of variable wall thickness on a hybrid bat is not common, but there are a few bats that use variable wall thickness in a single piece aluminum. The most popular of those is the Rawlings VELO. (See our VELO Review)
If you want a two piece bat with variable wall thickness not called the Mizuno Covert, then check out the Boombah Cannon. That bat is the most similar bat to the Mizuno Covert on the market today. (See our Boombah Cannon Review)
There are no differences, aside from the color up, between the 2017 and 2018 Covert. We refer you to the 2017 Covert Review for more insight on this bat.
That is—there are no differences except for the addition of a USABat in the 2018 line of Mizuno Coverts.
Like last year, the 2018 Mizuno Covert is a two piece hybrid baseball bat built for the average size player. The aluminum barrel is built for hot out of the wrapper performance. The composite handle gives the bat a lighter feel. And the connective piece between the two attempts to dampen sting on mishits.
The bat also uses variable wall thickness in the aluminum barrel. This allows for a larger sweet spot and a larger physical barrel, too, without affecting swing weight. The design is much like a few other bats on the market, and just like the 2017 version of the Mizuno Covert.
The overall rating uses seven different weighted metrics to determine our overall score. Half of total rating comes from the player and our exit speed tests (Player Rating: 25%, Performance: 25%).The other categories are Relevance (20%), Demand (10%), Durability (10%), Resell Score (5%), and Tech Specs (5%).
*: When a bat is denoted by a star (*) it is a preliminary rating. Expect it to be updated as we learn more about the bat and gather more data.
(PlaRa) Player Rating: We measure player rating from user reviews. Those users include our own hitters that we test at the lab as well as reviews we find online.
(ExVe) Performance: Performance measures the exit speeds and distances we capture in our hitting lab with HitTrax using these bats.
(Relv) Relevance: We measure the number of sizes and the MOI of the bat. Bats with a wider range of options get a better score.
(Dmnd) Demand: Demand is measured by consumer sentiment and the buzz around the bat.
(Drb) Durability: A bat’s durability is measured by user reviews as well as feedback from manufacturers.
(ReSl) Resell Score: Based on the price the bats go for used. Higher prices mean greater user demand which means, generally, a better bat. A resell value closer to its original price means a higher score.
(Tech) Tech Specs: We rate the bat on its technological advancements from previous years and compared to the industry at large. This is our chance to reward companies who are trying to innovate.
MOI
MOI or Mass Moment of Inertia is a measurement of bat swing weight. This quantifies how difficult it is to swing a bat. The industry often refers to this as things like End Load or Balanced but those words have been overused to the point of meaninglessness. We measure the actual swing weights of each bat we test using the industry-standard pendulum period, balance point, and scale weight. You can read more about that here.
Price
The price is the original MSRP price of the bat.
Type
The types of bats are single-piece alloy (SPA), two-piece composite (TPC), single-piece composite (SPC), hybrid (Hyb.), and wood (Wood). Hybrid bats are made of composite handles and alloy barrles.
Date
The estimated date the bat began distribution.
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