2002 fuel injector leaking

I was changing plugs and wires on my 02 regal 3800 motor and noticed when I was reaching around the back of the motor that 1 fuel injector was leaking. My question is could it be an o-ring or is it the injector.

Is this a LS or GS model? Each fuel injector has two o-ring seals. An upper and lower. In most cases just replace the o-rings.

It's an LS with around 90k mileage. I'm going to replace the o-rings first due to the cost of a new injector. thanks for the info.