Griffin, the younger brother of Darrell Griffin, kicked six goals from four attempts during the game, as well as making some crucial, try-saving tackles.
“Josh has sneaked under the radar,” Harris said.
“People have been talking about Mason [Caton=Brown] and Kevin [Locke] coming in and Josh has had three really good games for us now.
“He’s big and athletic and causes teams trouble. We’re excited about him.”
Harris, meanwhile, believes that his team is beginning to improve, and are giving themselves a better chance of making the top eight this season.
“We’re all desperate to get into the play-offs but we’re seven games away from that,” he added.
“What we do over the next nine weeks will determine whether we are in there or not. We’ve got a lot of improving to do to beat good teams and we’ll be making those improvements on the training field this week.
“We’re building a reputation here as a physical team that is prepared to work for each other and I thought for 50 minutes we improved that reputation.
“But the last 30 minutes wasn’t good enough for us. We fell in love with ourselves a little bit and started to cut a few corners, which is not acceptable. We’ve lost an opportunity here.”