Red Hot Chili Peppers Frontman Undergoes Surgery
11 January 2012, 16:32 | Updated: 16 August 2013, 12:36

According to a statement on their website the frontman "underwent surgery to remove a crushed sesamoid bone and correct a detached flexor tendon in his foot".
He's expected to make a full recovery though.
They've had to postpone more than twenty shows stateside.