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The UFC made an aggressive match for Chris Daukaus, who until Dec. 1 was only a part-time fighter and a full-time Philadelphia police officer. On Saturday in the main event of UFC Fight Night, Daukaus will face Derrick Lewis, who in his last fight competed for the interim heavyweight title.

Daukaus resigned from the Philly PD to concentrate full-time on an MMA career. He’s 4-0 in the UFC with four knockouts, three of which have come in the first round.

Daukaus used to regard fighting as a side job and didn’t always put everything he had into it, MSN reports.

“Especially early in my career before I started taking this seriously, I’d skip training sessions for overtime or all these little things at work that would make me extra money,” Daukaus said. “It showed in my performances. I was getting overweight. I was sloppy with my technique. I wasn’t in the gym as much as I could have been or should have been.

“But now that I’m all in on this, I’m really excited to see what my body is able to put out and what I can do with my skillset.”

Daukaus has a black belt in Brazilian Jiu-Jitsu, but 11 of his 12 career wins have been by knockout. The other was by decision.

Daukaus has plenty of respect for Lewis as a fighter. Lewis has 20 knockouts among his 25 career wins and his 12 KOs in the UFC ties him with Matt Brown for the promotional record.