John Kavanagh says Conor McGregor’s UFC 329 knee issue was “never an issue” before the headliner

UFC 329’s headliner shifted abruptly when Conor McGregor’s knee became a central problem during the main event, and his longtime head coach John Kavanagh described the situation as shocking and difficult to process. Kavanagh said he and McGregor did not see the knee issue coming in the build-up, framing the problem as something that had not been a concern before fight night.

In the comments reported by Yahoo Sports, Kavanagh said he was “devastated” by what unfolded in the UFC 329 main event. The coach’s reaction underscored how high the stakes are for McGregor’s camp each time the Irish star steps into the Octagon, not just in terms of the fight itself, but in terms of what a single physical setback can change about a larger season-long plan.

UFC 329’s main event matters beyond the two fighters in the cage, because headliners typically set the rhythm for a card’s narrative and, for a star like McGregor, can shape public expectations about what comes next in the title picture or in contender matchups. When an injury disrupts that pathway, it can also affect training cycles, promotional timelines, and how quickly a promotion can pivot to a new matchup direction.

Kavanagh’s “never an issue” framing is also notable because it speaks to the day-to-day monitoring that elite camps emphasize, especially in the weeks before a major fight. Even without additional specifics provided in the report, the coach’s stance suggests the knee did not stand out as a limiting factor during preparation, at least not in a way that forced a change in approach.

For McGregor, the immediate practical impact is clear: a knee problem carries a much wider risk profile than many other injuries, because it can affect stance, pressure, turning his hips during strikes, and the ability to follow through on movement. That kind of functional impairment can quickly change the strategic balance of a fight, even if the athlete tries to work around it.

For UFC matchmaking, the timing can be decisive. When a knee issue becomes a factor in the headliner, the promotion may need to decide how to handle ranking implications and what it means for subsequent event planning. Even when a bout outcome is already known, an injury-driven disruption can alter how the organization evaluates next steps, including whether a rematch is realistic or whether the spotlight shifts to other contenders.

Kavanagh’s comments also highlight the human side of elite competition. Coaches and athletes invest heavily in the belief that preparation will translate into fight-day execution. When that link breaks at the highest profile moment, it tends to produce a kind of blunt, lingering disappointment that goes beyond the result.

What to watch next is not only any official UFC update on the status of McGregor’s knee and recovery timeline, but also whether the promotion clarifies how it intends to position the division after UFC 329. If McGregor’s knee becomes a longer-term concern, that could reshape the short-term conversation around contenders and title opportunities. If it is manageable quickly, attention will likely return to the competitive question of where he fits next, and how soon he can return to a full training cycle.

The reported information in the Yahoo Sports piece focuses on Kavanagh’s reaction and his assertion that the knee had not been a problem before the injury, but it does not provide additional medical details in what is available here. As a result, readers should treat the exact nature and duration of the knee issue as uncertain until more information is confirmed by official UFC channels or direct statements from the athlete or camp.