I was a fan of the original Mutant Cell, but one thing I noticed was how flippy the core was with the layout I had on it (roughly 5” x 4 ¾” should memory serve me correctly), so I wanted to shift the pin closer to the VAL to smooth out the read off the dry in the pearl. Mission accomplished. This ball provides me with super clean length through the front and a very angular yet smooth transition off of the dry. I was very impressed. It compliments both my Mutant Cell and my Cell Pearl well- giving me a little more length and more angularity than the Cell Pearl, which should allow me to make the jump further left as lanes transition in long-block tournaments and giving me a ball to go to with a similar yet longer look from my Mutant Cell when the Mutant Cell is burning too much energy. The pastel colors are kind of cool looking, even though they wouldn’t suit me ordinarily. Color-wise it kind of looks like the demon offspring of a Cell Pearl and a Rogue Cell….. I guess that’s just yet another mutation!

My first Mutant Cell Pearl has a layout of 40 x 4 1/2 x 30 at box condition, this ball worked well on a THS at 41ft with the Kegel drop brush program. I used it on the White Pattern #2 and was hopeful in getting around the corner on the left side of the lane. Quite amazing how much punch this ball had coming off the breakpoint, strong, but not jerky like a lot of pearl coverstocks are. Good luck to all that buys and drills a New Mutant Cell Pearl.
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Rick Mitchell
Roto-Grip Staff Member

This is my 1st review on here so please take it easy on me.

Mutant Cell Pearl
15# 3oz, 2-3" Pin, 2.80 oz top weight to start.

Layout
5" x 4" with 2 1/2" pin buffer
This put the pin almost directly above my bridge by about 3/4", the CG about a 1/2" above my mid-line and the MB to the right of my thumb about 1.5". No weight hole for this one.

I drilled this similar to a Cell Pearl I have, 5 1/2 x 4, but I wanted the Mutant Cell Pearl to pick up just a touch sooner and finish stronger.

First time I used it was in my buddies Vegas league (subbed only to throw this ball...LOL). The house shot is used for this league, 40' of China. For the 1st game and part of the 2nd it was OK but not great. A little too much backend and left a couple 9-pins and 10's for 236. 2nd game it started rolling better as the oil pushed down, and had 258. Game I started X 9/(10 pin) moved in and went sheet for 280. I definitely like this ball when there is some oil down lane, handles carry down much better than my Cell Pearl.

2nd time I used this rock was in my open doubles "sport shot" league. We use the Kegel sport patterns. This round we are on Boardwalk, basically Kegel's version of Cheetah. Honestly I didn't think there was anyway possible I would use this ball on this pattern but I brought it cuz it was new. We bowl 6 games, moving after every 2 games. For the 1st set I used a Rogue Cell that I pretty much drilled for these type patterns (pukes hard on the backend). Nothing incredible, shot like 440ish. 2nd set the lanes were scorched, I stayed with the Rogue and just threw it harder. Shot like 430ish. In our 3rd set the lanes were pretty tight, especially down lane. Enter...Mutant Cell Pearl, I was able to bump in just a touch and go like 10-12 at the arrows to like 2-3 at the break point. Amazing how well this ball rolled, it stayed smooth and on line but gave me plenty of pop to avoid flat 10's. I shot 258, 237 the last 2 games using this ball. Wish I could have switched to it sooner.

I am really looking forward to throwing this ball on some longer patterns and I expect to use it a ton, in the middle and late in qualifying blocks.

From what I have seen so far, Rotogrip has produced another winner!

Zack Jellsey
Roto/Storm staffer
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Mutant Cell Pearl
Roto Grip has done a really good job of creating an idea of ball movement and then building a ball to match that intent.  

With the Mutant Cell Pearl they wanted to match the predictability strong continuous motion of the original Cell with a little stronger move down lane.  Roto Grip made some adjustments to the core that enhances the RG and differential.   Now add the new Cytoplasmic XL pearl reactive coverstock which is a little stronger the Cell Pearl and they got just what they wanted.

 The Mutant Cell Pearl is a great compliment to the Cell series.  A lot smoother down the lane than the Mutant Cell and I found much more forgiving.  
We are currently bowling a summer PBA Exp league using the Scorpion Pattern on Pro Anvilane.  I’ve been using a Nomad sanded with 1500 Abralon which gives me a really good look.  This helps me control the longer pattern and mainly stay out of trouble.  I didn’t think the Mutant Cell Pearl would be right move, as a strong move off the end of the pattern usually gets you into more trouble.  But since I just drilled it I wanted to see how it looked.  After shooting 835 (4 games) the week before with the Nomad.  I came in a little more defensive.  By the end of the night I realized it gave me a little more wiggle room and I could be a little more offensive.  Very pleased with a 940 for the night!

The Cell cores creates a shape and predictability no other balls have matched. For tougher patterns it’s hard to find a better look or success than the Cell series.

Thank you Roto Grip!

Kelly O’Driscoll
Roto Grip Staff

Ball specs – 15 lbs 3 oz, 2.82 oz top weight, and a 3 3/8-inch pin.

The Mutant Cell Pearl was punched using the dual angle layout method, 5-inch pin by 40-degree drill angle by 30 degree VAL angle. If you are using the Storm method, the layout is a 5-inch pin, 3 ½-inch mass bias, and a 2-inch pin buffer.  (Looking for a little length with a strong backend move.)  An X-hole was not needed and the finish was left OOB.  

For comparison sake I threw the Mutant Cell Pearl and a Cell Pearl.  The Mutant Pearl provided just a little more length about the same read in the mid-lane and a very different look on the back end than the Cell Pearl.  I would describe the backend move as stronger off the friction with more continuation through the pins.  Another way to describe the back end motion is very strong but not unpredictable.  Both hit and carry were tremendous.  This one is a keeper.  

The Mutant Cell Pearl will handle oilier to medium heavy oil patterns and provides a ball motion that many, many bowlers will want in their bag.


John Brodersen

Roto Grip Mutant Cell Pearl

For comparison I threw the Mutant Cell Pearl and a Cell Pearl.
The Mutant Pearl provided more length and better mid-lane read,
Movement motion was continuous off the midline to Pin Deck,
Over the Cell Pearl
I would describe the Mutant Cell Pearl backend movement as strong and predictable with tremendous Carry
 This one is a keeper.
  Recommended Lane Conditions: Medium-Heavy Oil
The Mutant Cell Pearl also has the ability to handle oilier to medium heavy patterns
The combination of increased surface topography and enhanced friction has delivers stronger mid-lane traction with extreme entry angle to the pocket.
The Mutant Cell Pearl provides a ball motion that I believe many bowlers will want in their bag.
A Great Addition the Mutant & Cell Pearl,

As I Stated earlier the Mutant Cell Pearl will match the predictability strong continuous motion of the original Cells.
With increased motion potential down the lane
The weight block maintains its dynamic integrity and differential value after drilling as well any balls on the market.

The Mutant Cell Pearl was punched for my game using the dual angle layout method,
70-degree drill angle by 65 degree VAL angle. If you are using the Storm method, I believe the  layout is a 5-inch pin 4 ½To 4 3/4 inch mass bias, and a 2-inch pin buffer.
I prefer  my holes on axis
 Looking for a little length with a strong backend move,
 I recommendation is the Mutant Cell Pearl
The Mutant pearl is extremely versatile :

Thanks Roto Grip
Member of Buddies Pro Shop
Member Of the Vise Grip Staff

The Mutant Cell Pearl is a great ball that gives a player versatility on the lanes.  As a lower revs and lower speed player, I need a ball that can store its energy for the back end.   I’ve found success with it on both house shot and sport shot conditions. The movement of this ball is very predictable and can be used to play any part of the lane.  I like that this ball is not overly aggressive on the back end, but still drives through the pocket.  It is a great ball to add to any arsenal.
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Rebekah Diers
2009 Clash of Champions
Amateur Roto Grip Staff