"I am out for six to eight weeks after I have the operation this week so it is pretty gutting how something so little can have that impact," Perrin said.
"I have started every game of the season and I was tracking along really well, I thought, and had struck up a good combination with the two big locks at lineout time.
"Our lineout is functioning the best in the competition at 93 per cent and our scrum is up there as the third best as well. It helps to keep the same guys out on the track every week because you lose a bit of rhythm if you are chopping and changing players.
"It also helps to have competition for places. John Pareanga and I have been fighting for that hooker's jersey for three years and have pushed each other harder and harder. He will carry on where I left off. He is a top man and his work ethic is second to none as well."
Perrin says the Bay's recent success against Wellington will help motivate the players.
"We have gone really well against them in the last three or four years, and with the last one being so convincing, the boys can take a lot of confidence out of that.
"Wellington will still be a little bit dark on what happened and after a loss to Auckland [on Saturday], it is pretty desperate times for both teams.
"It could well be a cracker of a game."
The positive side on the Steamers injury report is wingers Jack Wilson and Ben Smith were running about sprightly at team training on Sunday, and both may be in the frame for selection. NZ Under-20s hooker Nathan Harris is set for a call-up to the bench from the Bay Development XV.
Kickoff at Baypark, Mt Maunganui is 7.35pm.