The MarcPro is a great recovery tool you can use in addition to your UBALL.  

Marc Pro and Marc Pro Plus are unique electrical stimulation devices that are able to provide substantial recovery and pain relief benefits. These are not TENS devices; which are intended to mask pain while connected. These are not traditional muscle stimulators; which use harsh and fatiguing muscle contractions to tone or re-educate muscle. A 30-60 minute session with Marc Pro is easy, comfortable, and is often done while you’re relaxing on the couch reading or watching television. A Marc Pro session uses proprietary and patented technology to create non-fatiguing muscle contractions that flush out waste and deliver nourishment to the area. This is the foundation of recovery, conditioning, and lasting pain relief.

If you've watch any MWOD videos then you know how great Kelly Starrett is!  In addition to his mobility and movement drills, he is a true believer in the MarcPro and explains why here:
Noah Olsen, a professional CrossFit Athlete, uses the MarcPro as well to help in his recovery as well as many other elite CrossFit athletes:
Many professionals use the MarcPro to help with pain relief and recovery: