Bishop Amat quarterback Rio Ruiz, who hasn’t played since suffering a knee injury in a 14-3 loss to Loyola in Week 9, will participate in a light-practice today and suit up for Friday’s CIF-SS first-round playoff game against Santa Margarita at Saddleback College. Sophomore Koa Haynes, who has taken most reps this week is likely to start, though coaches say they will make that decision on Friday during warm-ups.