-Toast the pecans in a dry skillet over medium/low until you start to smell them. Cool completely and set aside.
-In the bowl of a stand mixer with the paddle attachment (or a large bowl with a hand mixer), blend the cream cheese, horseradish sauce, green onions, pimentos, 2 ounces of the bacon bits, salt, and pepper until combined.
-Stir in the shredded cheeses until they are well incorporated.
-Working with wet hands (so the cheese doesn't stick so much), shape the cheese mixture into a football-shape on a chosen platter.
-Combine the remaining bacon bits and the toasted pecans in a bowl and generously press them onto the football, making sure to cover the entire shape.
-Use a paring knife, cut small strips of the string cheese to form the football's laces.
-Use a chopstick or skewer to stick the ends of the string cheese into the cheese ball to "attach" and press with your fingers to cover any hole that you've just made with the skewer (this will also anchor the laces to the football).
-Arrange parsley around the football as garnish (optional).
-Wrap with plastic wrap and chill until ready to serve with crackers.