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<< Baseball Reviews

2017 Mizuno Covert Review

By Bat Digest | Last Updated June 10, 2022


We recently hit with the BBCOR and Big Barrel versions of the new 2017 Mizuno Covert. Our hitting experience was mostly in cage, although we took it to the field to see ball flight as well. We also exchanged a number of emails with Mizuno to dial in our understanding of the bat and how it upgraded from the 2016 Nighthawk. As well, a number of trusted online sources were referenced for details and other player experience on the Covert. All of this information is compiled below in our 2017 Mizuno Covert Review.


2017 Covert Video

2017 Covert Video

2017 Covert Models


Although there are some notable differences, the idea is the same between the 2016 Nighthawk and the 2017 Covert. Both bats are two-piece hybrid bats. This means they have a composite handle and an aluminum alloy barrel. They are welded together around the midpoint of the bat.

By way of changes, Mizuno updated the aluminum alloy in the bat. They claim the alloy is stronger and, therefore, the walls can be thinner. Thinner walls would allow the bat a larger sweet spot by exaggerating the tapered barrel design without losing durability. Mizuno claims the sweet spot (where max pop is achieved) is 22% longer than the Nighthawk.

There is no practical way to confirm if these advancements have been achieved, we simply report on what they claim.

The thinner walls also decrease the effective swing weight. Although it should still be considered a mid-balanced bat, the 2017 Covert will swing lighter than the 2016 Nighthawk.

BBCOR
/10
USSSA –10
/10
USSSA –9
/10
USSSA –5
/10
USSSA –12
/10

General Recomendations

Those who have used the 2016 BBCOR Nighthawk came away impressed. Additionally, although always wary of believing so-called user reviews, the Nighthawk rarely receives anything but maximum stars. Most players comment on the pop of the bat and how surprised they are few players use, or even know, the bat. Like last year, we would recommend the 2017 Covert to players who:

  • Appreciate a mid to low-swing weight bat
  • Like the hot out-of-the-wrapper feel of a top-shelf hybrid
  • Want a good-sized barrel with good performance
  • Are not in the Youth Barrel (2 1/4) space
  • Looking for something a bit off the beaten path that still competes with any bat on the market

Although a legit bat, that doesn’t mean it is for everyone. We’d stay away from the bat if we fit into any of the categories below.

  • Although $300 in BBCOR at release, those on a budget might look at last year’s Nighthawk despite the smaller barrel and heavier swing
  • Preferring an ultra-light swing weight
  • Looking for a massively over-sized barrel
  • Seeking an end-loaded feel
  • Preferring a single piece or composite barrel

Model Recommendations

MZ83942TD

BBCOR Review

Covert BBCOR Ratings (key)
3 2 3 4 3 1 3 4 4 2
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

OVERALL/10
Patented 2 PC Link? Hybrid Construction combines our Hot Metal? single wall aluminum alloy barrel with composite handle for ultimate combination of performance and vibration reduction. CORTECH? adjusts wall thickness across the barrel creating a massive sweet area for unequaled forgiveness. Mizuno?s exclusive Speed-Helix grip? provides comfort and durability. USSSA Approved.
Sizing: 31, 32, 33, 34-inch
Release Date: August 1, 2016
Serial: MZ83942TD
Bat Type: Single Piece Alloy
Barrel Size: 2 5/8
See other BBCOR Bats
MZ49702TD10

USSSA Drop 10 Review

Covert USSSA Drop 10 Ratings (key)
3 2 3 4 2 1 4 4 5 2
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

OVERALL/10
Patented 2 PC Link? Hybrid Construction combines our Hot Metal? single wall aluminum alloy barrel with composite handle for ultimate combination of performance and vibration reduction. CORTECH? adjusts wall thickness across the barrel creating a massive sweet area for unequaled forgiveness. Mizuno?s exclusive Speed-Helix grip? provides comfort and durability. USSSA Approved.
Sizing: 27, 28, 29, 30, 31, 32-inch
Release Date: August 1, 2016
Serial: MZ49702TD10
Bat Type: Single Piece Alloy
Barrel Size: 2 3/4
See other Drop 10 USSSA Bats
MZ49702TD9

USSSA Drop 9 Review

Covert USSSA Drop 9 Ratings (key)
3 2 3 4 2 1 3 4 4 2
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

OVERALL/10
Patented 2 PC Link? Hybrid Construction combines our Hot Metal? single wall aluminum alloy barrel with composite handle for ultimate combination of performance and vibration reduction. CORTECH? adjusts wall thickness across the barrel creating a massive sweet area for unequaled forgiveness. Mizuno?s exclusive Speed-Helix grip? provides comfort and durability. USSSA Approved.
Sizing: 29, 30, 31, 32-inch
Release Date: August 1, 2016
Serial: MZ49702TD9
Bat Type: Single Piece Alloy
Barrel Size: 2 5/8
MZ49702TD5

USSSA Drop 5 Review

Covert USSSA Drop 5 Ratings (key)
4 2 3 4 2 1 3 3 3 2
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

OVERALL/10
Patented 2 PC Link? Hybrid Construction combines our Hot Metal? single wall aluminum alloy barrel with composite handle for ultimate combination of performance and vibration reduction. CORTECH? adjusts wall thickness across the barrel creating a massive sweet area for unequaled forgiveness. Mizuno?s exclusive Speed-Helix grip? provides comfort and durability. USSSA Approved.
Sizing: 30, 31, 32-inch
Release Date: August 1, 2016
Serial: MZ49702TD5
Bat Type: Single Piece Alloy
Barrel Size: 2 5/8
See other Drop 5 USSSA Bats
MZ49702TD12

USSSA Drop 12 Review

Covert USSSA Drop 12 Ratings (key)
3 2 3 4 2 1 4 4 5 2
MOI Tech Drb Flx Prof ReSl PlaRa ExVe Relv Dmnd

OVERALL/10
Patented 2 PC Link? Hybrid Construction combines our Hot Metal? single wall aluminum alloy barrel with composite handle for ultimate combination of performance and vibration reduction. CORTECH? adjusts wall thickness across the barrel creating a massive sweet area for unequaled forgiveness. Mizuno?s exclusive Speed-Helix grip? provides comfort and durability. USSSA Approved.
Sizing: 28, 29, 30, 31, 32-inch
Release Date: August 1, 2016
Serial: MZ49702TD12
Bat Type: Single Piece Alloy
Barrel Size: 2 1/4

Comparable Bats

The two-piece hybrid bat with a mid to light swing has a few competitors. None have the same tapered inner barrel the Mizuno Covert uses, but a few get some good barrel size and performance reports.

Two bats, in particular, come to mind. The 2016 Louisville Slugger 716 (Our review) and the 2017 DeMarini Voodoo Balanced (our review). Both have similar price points, swing weights, and performance metrics as the 2017 Mizuno Covert. Those looking for similar bats may want to check them out as well.

Previous Models

The 2017 Mizuno Covert is a new name in the 2017 Mizuno line of baseball bats. It should be considered the next generation 2016 Mizuno Nighthawk. The name change, as far as we have gathered, is to clear up the confusion between the Mizuno Nighthawk fastpitch line, made up of two-piece composite bats, and the Nighthawk baseball line, made of hybrid bats. The Covert model should be the hybrid baseball bat name going forward.

Amazingly, Mizuno has only been in the metal and composite bat space for 3 years. Mizuno is dead serious about making top-shelf performance bats in the BBCOR and Big Barrel space. Seriously, watch out.

Overall Ratings

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%).

(UR) Un Rated: An overall rating of UR means the bat has yet to be fully rated. When it is, this score will update.

(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.

2017 Mizuno Covert User Reviews

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