That isn't the first time he's worn the band. Madrid's dressing room policy is the next senior player wearing the band. Since Casillas didn't play it went to Kaka. Pepe has been in Madrid since '07 but didn't start. It's weird that you being a Madrid fan find this as news (just saying). If you're young or a new fan I apologize.
Thanks for the lesson. I know how the policy works, I was just surprised he was wearing it.