Can a cat cause this issue?

[take a chance]

I changed the wires yesterday and I am still having misfire and both o2 sensors are saying they are stuck rich and I'm smoking and you can smell the unburnt fuel. I also unplugged my maf sensor and the truck idled with no change and started with it unplugged. Even after resetting the codes.

 

[take a chance]

UPDATE!
One of my fuel injectors that I just purchased in went bad. It was stuck open and filled my intake on cylinder 1 with fuel. I replaced it with on of the old ones I had but still getting misfire. Because the cylinder was full of fuel it fouled my plug. I'm thinking it may have blown the head gasket. Doing a leakdown test today. Let you guys know what I find. Thank you for your replies to my posts.
I have also replaced both o2 sensors again as they were saying they were stuck rich.

 

[gw33gp]

An exhaust leak before an O2 sensor can cause the O2 sensor to demand more fuel. That leak could let air in making the O2 sensor detect the exhaust is lean, but I think both sides would need to have a leak for both sides to run rich.

You might be able to check that by getting the computer in open loop. I think that happens around 2,500 rpm or higher. That takes the O2 sensor out of the input for control of the fuel. If the engine clears up, you will have a better idea of what to look for.