X-Men Origins: Wolverine actor Liev Schreiber has explained why Deadpool & Wolverine did not feature the return of his Sabretooth in the MCU. Schreiber is the second actor to portray longstanding Wolverine rival Sabretooth in a live-action movie, after Tyler Mane. Despite boasting a lot more screen time in X-Men Origins: Wolverine, however, Schreiber was not counted among the many Deadpool & Wolverine cameos.

When asked in an interview with Collider about his absence, Schreiber stated that while he was touched by fans calling for his return, he was happy to pass on the role after seeing the physical demands met by his erstwhile co-star, Hugh Jackman. His full quote is as follows:

To be honest, it’s a lot of work getting your body up to that point. I know I watched Hugh [Jackman] get himself ready again, and I thought, ‘I’m okay to sit by the sidelines.’

Source: Collider