EE WAS PULLING A PIPE UP OUT OF THE WATER/MUD. HIS FOOT SANK INTO THE MUD & HE FELT HIS RIGHT SHOULDER POP. EE WAS TAKEN TO CLINIC & RELEASED TO WORK NORMAL WORK ACTIVITY. HOWEVER, THE CONDITION LATER WORSENED & DR PERFORMED SURGERY ON 3/22/04 RESULTING IN THE INCIDENT TRANSITIONING TO A REPORTABLE LOST TIME.