L3nn0n
I have near 65K in miles this year and pretty much travel often across the country for bowling tournaments and I ALWAYS carry a two ball tote with me on the plane (checking 2 three-ball rollers).. and I've never had any problems.
The one airport that has given me trouble 2/3 times was CLE (last Feb). I missed the flight because the a-hole TSA agent insisted that since their machines couldn't see thru the balls that they couldn't pass. We argued, I flat out told him he's just trying to get be a tool on purpose just so I have to pay extra $$ to check a third bag which is astronomical if you've checked 2 prior.
In the end I missed the flight due to the fine ego of one TSA agent.. the airline compd me a room for the hassle.
I've been in/out of several hi traffic airports numerous times on numerous occasions (NWR, ATL, SFO, LAX, ORL, DET, etc) never problems.
Good luck.