Alistair Overeem‘s return to the octagon has been shifted from UFC 164 to the promotion’s debut event on FOX Sports 1.

Mutiple sources close to the event today told MMAjunkie.com (www.mmajunkie.com) that Overeem (36-12 MMA, 1-1 UFC) is set to meet fellow standout heavyweight Travis Browne (14-1-1 MMA, 5-1-1 UFC) at UFC on FOX Sports 1 1, which takes place Aug. 17 at TD Garden in Boston.

Although the fight will be part of the night’s main card and a major attraction, it won’t even be the main event, UFC President Dana White subsequently told MMAjunkie.com. That assures at least one other significant bout will be added to the card.

Overeem originally was targeted to appear at UFC 164, which takes place Aug. 31 at Bradley Center in Milwaukee. Recently, the ex-Strikeforce champ tweeted, “Training hard and looking forward to aug 31!”

Overeem previously was scheduled to fight Junior dos Santos this weekend at UFC 160, but he was forced to withdraw from the event with an injury.

In his most recent performance at UFC 156, he suffered a knockout loss to underdog Antonio Silva, who is set to meet champ Cain Velasquez in UFC 160’s headliner this weekend. That followed another setback when he tested positive for elevated levels of testosterone prior to a scheduled fight with dos Santos at UFC 146, which effectively barred him from competition for nine months.

Browne most recently fought at The Ultimate Fighter 17 Finale, where he earned a first-round knockout win over onetime heavyweight title challenger Gabriel Gonzaga. Afterward, Gonzaga appealed the bout’s official result, claiming the fight should be changed to a no-contest due to illegal strikes thrown by Browne. However, the Nevada State Athletic Commission denied his request.

The win put Browne back in the winner’s column after a first-round TKO loss to Silva at UFC on FX 6, which came after he tore his hamstring early in the fight.

Overeem currently is ranked No. 4 and Browne No. 12 in the USA TODAY Sports/MMAjunkie.com MMA heavyweight rankings.

For the latest on UFC on FOX Sports 1 1, stay tuned to the UFC Rumors section of the site.

(Pictured: Alistair Overeem)