Baseball sized and then a bunch more? You should seek a 2nd opinion at a major bladder cancer center. The best places (e.g. Memorial Sloan Kettering, MD Anderson, etc.) have Urologic Oncology departments. They work as a team with doctors who specialize in bladder cancer.
Did your doctor happen to mention the grade of the cancer? Usually either 1 through 3 or High grade/Low Grade.
In either case, you should really get to the doctors at a top place. The two I mentioned are preferences if travel is not an issue at all. If it is, let us know where you are located and we can see if we can point you to a place and doctor closer to you.
Mike
Age 54
10/31/06 dx CIS (TisG3) non-invasive (at 47)
9/19/08 TURB/TUIP dx Invasive T2G3
10/8/08 RC neobladder(at 49)
2/15/13 T4G3N3M1 distant metastases(at 53)
9/2013 finished chemo -cancer free again
1/2014 ct scan results....distant mets
2/2014 ct result...spread to liver, kidneys, and lymph...