Major changes are in store for Bellator MMA.

Spike TV announced that the Viacom-owned promotion has cut ties with CEO and founder Bjorn Rebney and COO Tim Danaher.

No reason was given for the departures; however, Rebney’s statement hints at the underlying cause of the split.

“It is with bittersweet emotions that I announce that I am leaving the company I founded,” Rebney stated. “I have great pride in having turned my vision into reality, a thriving business with television distribution to over 140 countries around the world, a partnership with one of the world’s largest entertainment giants and wide array of sponsors, partners and strategic allies all over the globe.

“This has been a wonderful eight plus years of creation, development and success. I will miss the courageous, strong and dedicated fighters I have had the pleasure of promoting, and equally, I will miss the incredibly hard working, remarkable team that has become a family for me over the years. Viacom and Tim and I differed in our views of the right strategic direction for Bellator, but Tim and I both wish them well.”

Rebney launched the promotion in 2009. After initially airing on ESPN Deportes, the promotion moved to MTV2 in 2010 and then to Spike TV after the network’s broadcast deal with the UFC ran its course. To date, the promotion has hosted 121 events, including its first pay-per-view card this May.

Rumors are circulating that former Strikeforce CEO Scott Coker will step into Rebney’s role, but no replacements have been announced by the promotion at this time.