For the sixth time in his UFC career, Abel Trujillo has been part of a fight change or cancelation within one month of an event.

MMAjunkie today learned that Trujillo (12-6 MMA, 3-2 UFC) on Tuesday suffered a broken arm in training, which has forced him out the April 25 contest against John Makdessi (12-3 MMA, 5-3 UFC) at UFC 186. Multiple sources subsequently confirmed to MMAjunkie that Shane Campbell (11-2 MMA, 0-0 UFC) will step in as a replacement.

The sources spoke on the condition of anonymity because they are not publicly authorized to discuss such matters. UFC representatives declined to comment when contacted by MMAjunkie.

The lightweight matchup was tapped to take place on the FOX Sports 1-televised preliminary portion of the card, which takes place at Montreal’s Bell Centre.

Trujillo is regarded as one of the most vicious knockout artists in the lightweight division but has had a difficult time actually finding his way into the octagon since his prior to his December 2012 debut.

He was expected to make his UFC debut at UFC 151, an event that ended up being canceled due to an injury to headliner Dan Henderson, who was scheduled to challenge Jon Jones for the 205-pound title.

Trujillo was then pitted against Tim Means at UFC on FOX 7, but Means suffered an injury on fight day. Fortunately, the UFC managed to find a replacement and Trujillo defeated Marcus LeVesseur.

The next few chapters of Trujillo’s career went smoothly, but he then had a bout against Myles Jury canceled at UFC Fight Night 44, which followed by another entire card being called off when the headliner fell through for UFC 176.

After that, Trujillo withdrew from a UFC Fight Night 47 bout with Ross Pearson due to injury. He most recently competed at UFC 181 in December where he suffered a second-round submission loss to Tony Ferguson.

With Trujillo again out of action, this time at UFC 186, the promotion has reportedly signed Campbell. The 27-year-old from Kelowna, British Columbia, Canada, has earned seven of his 11 career victories by stoppage and most recently earned a TKO of Derek Boyle at WSOF 18 in February.

For more on UFC 186, check out the UFC Rumors section of the site.