The goalkeeper felled the striker outside his box in the 65th minute of the Premiership clash at the Lane.
Thankfully, Mr Wiley showed him the yellow card and we went on to win a tough examination 3-1.
Although admitting he was slightly worried, Kasey believes the referee got it right.
"It's hard to tell sometimes what is going to happen," he reflected. "I thought I came out, stood there and tried to block the ball.
"I didn't think I would go. I would have been more surprised with a red than the yellow.
"If anything, it might have been obstruction. I didn't go out there to try and take him out or anything, sometimes you come out and just try to block the ball.
"It's the same anywhere else on the field, it's not a red card every time and I thought the referee got it right.
"I don't think that's what the rule is about anyway.
"It's more about a guy breaking through and someone taking him down or pulling his shirt 30 yards out to deny him having a one-on-one. That's what the rule is there for, not for players who try to make a challenge."
Kasey Keller said he would have been surprised if referee Alan Wiley had brandished a red card after his collision with West Brom's Scott Dobie on Sunday.