Preheat oven to 350 degree F. Line baking sheet with aluminum foil. Place chicken pieces on sheet and sprinkle with salt and pepper. Cover with foil and bake 40-50 minutes until chicken is cooked and the juices run clear. Cool, then shred chicken.
Combine chicken with remaining ingredients except the spinach and wraps, mix well. Place a generous scoop of chicken salad in the center of the wrap. Top with baby spinach. Fold in the edges and roll up. Repeat with the remaining wraps. Serve chilled.