McCarthy claimed Scharner was "taking the p***" after he held up his match shirt and displayed what was written underneath on his T-shirt in the closing stages of Albion's 2-0 win. Scharner has revealed he plans to use the t-shirt for charity.
McCarthy said: "I'm sorry I even got involved in that because Scharner played well.
"There was a lot made of it before I even knew what was on the shirt.
"Having found out there was a West Brom badge on it, I thought 'What the hell?' and it didn't bother me.
"People forget sometimes that I've been a player, and when someone does that to you when you're hurting, those are the kind of things that upset you."