21-year-old Crichton made the decision to have the top of his finger amputated before Christmas to ensure he hits the ground running in his last season for the Rabbitohs.
Crichton will join the Sydney Rooters in 2019 after taking up a lucrative deal with the Rabbitohs close rivals.
Crichton revealed how difficult the finger injury had been to deal with in an article for PlayersVoice back in December.
“My finger has been an ongoing injury I’ve had since I was playing in the under-20s,” he wrote.
“Originally, I ruptured the tendon and this is the sixth surgery I’ve had on it.
“It’s the middle finger in my left hand and, a while back, I got it fused. I’ve got no knuckle in it. The doctor said I could either cut it off halfway or fuse it. I’ve had it fused several times now because I keep breaking it.
“I’ve decided this is the last time I’m getting it fused. It’s the fourth fusion that’s broken and if it happens again I’m going to have it cut it in half, because I’m just over it.
“It might leave me with only half a finger, but I guess it would save a lot of confusion.”