Does anyone know what kind of core this ball has:
http://www.ebay.com/itm/EBONITE-NITRO-BOWLING-BALL-URETHANE-SANDED-PRO-BOWLER-14-LB-NEW-UNDRILLED-/330903471876?pt=Bowling&var=&hash=item4d0b624704

The picture seems to show a pin and a CG, implying it has a dynamic core, not a pancake core.

I don't see anything like on the USBC approved page. The closest ones are
- Nitro Dark Blue Pearl, approved Dec. 90
- Nitro Purple Haze,  approved Dec. 91

It doesn't seem to be part of the "Nitro R squared" series.

(FYI Yes, I'm very suspicious of the seller as his description implies he is not a bowler, and there is no box for the ball. Not to worry, this post is more out of sheer curiosity.)

Thanx!

+1 on what cobalt bomb says.

 I used to see ads for those at both Sports Authority and Dick's Sporting goods.

 Supposedly a mere pancake core with some type of urethane cover.

Ah! The dreaded Sports Authority.
It probably has 9 oz of top weight!!
Thanks, guys.

YES IT HAS A PANCAKE AND YES THEY ARE USBC APPROVED.

Thank you.

Jeff, this particular ball is on the approved list under the Nitro U name...

Understood.
Do you know it to be a Sports Authority ball?

Still would be a good ball. You can use Mo's plastic ball drilling layout to help increase the core dynamics. (was called the Wiseman pattern back in the late 80s when he was with Hammer)

Or even use some other standard layouts and have a very good ball for the price.

Why not just buy a Brunswick Karma Urethane for $65 and free shipping!

Still would be a good ball. You can use Mo's plastic ball drilling layout to help increase the core dynamics. (was called the Wiseman pattern back in the late 80s when he was with Hammer)

Or even use some other standard layouts and have a very good ball for the price.

Because
1. As stated in the original post, "Not to worry, this post is more out of sheer curiosity."
2. A solid dull urethane would and has been far too early for my ball speed.
3. I already own a polished Avalanche Pearl Urethane and a Seismic Desperado, also a polished pearl urethane.

But thank you anyway for the suggestions.

My suggestions are for anyone in general who may consider this ball not just you per say Charlest. (although it doesn't really read that way when I wrote it. It would be very similar ball to the Brunswick Groove Urethane which had the pancake weight block unlike the Power Groove counterparts that had asymmetric puck cores)