Bowler Ratings

PatternStTwCr
Oily:X.XX.XX.X
Medium:X.XX.XX.X
Dry:X.XX.XX.X
Sport:X.XX.XX.X

Bowler ratings are from 1 to 10 in order of Stroker (ST), Tweener (TW), Cranker (CR)

Note: Ratings are only available to our premium members.

General Info

Brand:
Name:Zero Mercy Pearl
Reviewed:December 2025
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Coverstock Specs
Name:HK22C2 Pearl
Type:Reactive Pearl
Box Finish:500 / 1000 / 1500 SiaAir / Factory Compound
Color:Silver / Orange / Black
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Core Specs
Name:Super Offset
Type:Asymmetrical
RG:2.524
Diff:0.053
Int. Diff:0.020

For details on our standard test layouts, please click here.

Hammer’s Zero Mercy Pearl is the glossy and pearlized companion to the Zero Mercy Solid. Both balls use the asymmetrical Super Offset core shape with new coverstocks. The Zero Mercy Pearl features the new HK22C2 Pearl formulation, and it comes out of the box with final finishing steps of 1500 SiaAir and Factory Compound. While providing more length and more back end motion than the Zero Mercy Solid, we found this new pearl cover to start up a bit earlier and be a little smoother compared to previous pearl versions of HK22, like HK22 – Cohesion Pearl, which was used on the Black Widow Mania. We had our best looks with this ball while there was still a good amount of oil in the front of the lane, as that helped prevent it from getting too forward at the breakpoint and the back end.

Stroker

Stroker had the best reaction with the Zero Mercy Pearl on the fresh medium oil pattern. He played a small swing from board 12 off his hand out to eight at the breakpoint. He liked being able to start straighter and see a strong midlane read from the shiny coverstock. This ball picked up earlier than both his Effect and his shiny Black Widows, providing a smoother motion off the breakpoint. He really found this motion beneficial as the pattern started going through transition. When other balls started to hit some carrydown and forced him to make big moves, he could stay in the same part of the lane with the Zero Mercy Pearl. He started increasing his speed as the session progressed, and he also started changing his release to keep the ball from hooking early. He didn’t need to make any surface changes on this pattern, as he was instead able

Additional Hammer Zero Mercy Pearl Resources

Click here to visit Hammer's website to read the manufacturer-supplied information on this ball. Also, see below for the manufacturer-produced promotional video for this ball.

Please remember that our reviews are solely based on our own testing and that you may sometimes find differences between our comments and ratings and the manufacturer's claims. Links to these manufacturer resources are provided here strictly for convenience purposes.

The BTM Ball Testing Team

About The BTM Ball Testing Team

Bowling This Month's ball testing team is led by Eric Martinez. Our team of three testers has reviewed well over 1,000 bowling balls for Bowling This Month. In addition to leading BTM's ball testing efforts, Eric owns and operates University Pro Shop in San Antonio, TX, and he is an avid competitive bowler. Learn more about our bowling ball testing and review process here.