UFC Fight Night 28: Who's on the Hot Seat?

UFC Fight Night 28 is set to take place Wednesday in Belo Horizonte, Brazil.

The event is headlined by a light heavyweight bout between Glover Teixeira and Ryan Bader. Both 205-pound fighters are near the top of their division and have long UFC careers ahead of them.

Some UFC Fight Night 28 fighters are on a much shorter leash, though.

At least four competitors could be competing for their UFC lives on Wednesday. Here are the men whose jobs are on the line heading into UFC Fight Night 28.

Yuri Villefort

Strikeforce veteran Yuri Villefort is in a must-win situation.

After losing to Nah-Shon Burrell in his UFC debut, Villefort has lost back-to-back fights. With his other loss coming against Quinn Mulhern under the Strikeforce banner, Villefort will need to win on Wednesday to prove he deserves a spot on the UFC roster.

Villefort faces Sean Spencer at UFC Fight Night 28. Spencer is also unproven at the UFC level, so Villefort will have a realistic opportunity to pick up his first UFC win in his home country of Brazil.

Sean Spencer

Like Yuri Villefort, Sean Spencer has only lost once inside the Octagon. However, Spencer's UFC roster spot could also be on the line at UFC Fight Night 28.

Spencer's first UFC appearance ended in a submission loss to Rafael Natal, so another loss to an opponent on a losing streak (like Villefort is) could cause the UFC brass to lose interest in him. 

Fighting in Villefort's home country of Brazil, Spencer will need to overcome a hostile crowd to remain a UFC welterweight fighter.

Keith Wisniewski

After losing his first two bouts since his UFC return, Keith Wisniewski likely must win on Wednesday to maintain a position on the UFC roster.

Wisniewski lost to Josh Neer in his UFC debut before dropping a split decision against Chris Clements. Though many fighters are released in the event that they lose in their first two UFC outings, Wisniewski has been given one more opportunity to prove himself due to the controversial nature of his most recent loss.

While there will be a lot of pressure on him heading into UFC Fight Night 28, Wisniewski should have a good shot at saving his job. The 31-year-old will welcome Ivan Jorge to the Octagon, and Jorge took the fight on short notice due to a Marcelo Guimaraes injury.

Joao Zeferino

With a loss to Elias Silveiro at UFC Fight Night 28, Joao Zeferino would likely be cut from the UFC roster.

Like Sean Spencer, Zeferino is coming off of a loss to Rafael Natal in his UFC debut. Unless he wins or puts together a Fight of the Night performance on Wednesday, Zeferino would likely be viewed as expendable by the UFC brass.

With UFC newcomer Silveiro replacing an injured Kenny Robertson on short notice, Zeferino should be in good position to pick up his first UFC win. However, the 26-year-old Silveiro is undefeated and could turn out to be a tough challenge for Zeferino.