Gently drain the crab meat and pat it dry with paper towels. This helps prevent soggy crab cakes.
In a large bowl, combine mayonnaise, beaten egg, Dijon mustard, Worcestershire sauce, and sriracha.
Add the bell pepper, parsley, green onions, Old Bay seasoning, cayenne pepper, salt, and black pepper. Mix well.
Fold in the panko breadcrumbs, then gently fold in the crab meat, being careful not to break up the lumps too much.
Cover and refrigerate for at least 30 minutes (or up to 4 hours) to help the mixture hold together better.
Form the mixture into 8 equal-sized patties, about 3 inches wide.
Coat each patty lightly with additional panko breadcrumbs.
Heat oil in a large skillet over medium heat until shimmering.
Cook crab cakes for 3-4 minutes per side until golden brown and heated through.