Most airlines it's a 50lbs limit so you should be ok.
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Bowling: It's cleaner than baseball.

And people wonder why I like to drive. You can take what you want and does not cost a dime extra.
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J. Helton
Perfect Approach Pro Shop

Delta:

Weigh 50 pounds (22.5 kg) or less.
Not exceed 62 inches when you total length + width + height.

Delta and Northwest Baggage Alignment Policy

Customers who purchased Delta tickets previous to April 9, 2008, regardless of travel date, will be permitted to check two bags free of charge.

Customers who purchased Delta tickets on or after April 9, 2008 through July 30, 2008, regardless of travel date, and who are traveling within the United States will be charged $25 for a second bag, but will be permitted to check their first bag without charge in keeping with Delta's previous policy.

Customers who purchased Delta tickets on or after July 31, 2008 through November 5, 2008, regardless of travel date and who are traveling within the United States will be charged $50 for a second bag, but will be permitted to check their first bag without charge in keeping with Delta's previous policy.


Customers who purchased tickets on or after November 6, 2008, and flying within the United States will be charged $15 for the first check bag and $25 for the second checked bag, consistent with Northwest's existing policies.

All customers flying in First or Business Class will receive up to three checked bags, up to 70 pounds each, for free.  SkyMiles Medallion members and WorldPerks Elite members flying in Coach Class will receive up to two checked bags, up to 70 pounds each, for free.

All customers traveling on full fare (Y) Coach Class Tickets will receive up to two checked bags, up to 70 pounds each, for free. Customers traveling outside the U.S. will receive up to two checked bags, 50 pounds each, for free.

U.S. Military personnel on active duty with travel orders will continue to be able to check up to 10 pieces of luggage on Delta- and Northwest-operated flights only.

Special Items
Each special item you're checking counts as one bag.
When checking in online, you don't have to tell us what the special item is—only that you have one.
An agent will determine any possible charges for your special item when you bring it to the baggage drop.
Included are:

Overweight bags - bags over 50 lbs
Oversize bags - bags over 62 inches (when you total the length + width + height)
Infant and children items - stroller, child restraint seats
Assistive devices - wheelchair
Sporting equipment - bicycle, bowling equipment, fishing equipment, golf equipment, ski equipment, parachute, surfboard, windsurf board, scuba tank
Musical instruments
Fragile/bulky items - saddle, antlers, Hawaiian pineapples, military duffle bags
Pets
Still have questions? Visit Special Baggage to learn more.

Checked Baggage Exceptions
Passengers traveling to or from Key West, Florida are limited to only one checked bag.

With the exception of original factory-sealed boxes that will be accepted on a standby basis, we do not accept boxes as checked baggage to Central or South America (except Brazil, Mexico, and Chile) at any time of the year.


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Bowling: It's cleaner than baseball.

I called Jetblue and asked if one had a two ball bag but only had one ball in it how would that be handled, and I was told there would be no extra charge.  However, if two balls were in the bag then it would be charged as if it were a 2nd bag and be subjected to weight limits.