Complex sentence: RSL has had a multi-million dollar sponsorship deal with LifeVantage, Previously made a multi-million dollar deal with XanGo a nutritional supplements company based in Utah, to carry the Xango logo on the front of RSL jerseys since the 2007 season.
Split into simpler sentences: RSL has had a multi-million dollar sponsorship deal with LifeVantage. It previously had a multi-million dollar deal with XanGo a nutritional supplements company based in Utah, to carry the Xango logo on the front of RSL jerseys since the 2007 season.