Mets pitcher Pedro Martinez, who will miss the next eight months with an arm injury, showed no loss of morale or confidence as he performed his own rotator-cuff surgery last week. 'My original plan was to make a minor incision in the shoulder and conduct an arthroscopy to examine the torn labrum,' Martinez told reporters at the Mets training facility while outlining his method on the photos he took during the procedure. 'However, the damage was extensive enough to necessitate me detaching my entire deltoid muscle and performing a thorough acromioplasty to remove bone spurs in my shoulder.' Martinez said he expected himself to recover well enough to perform surgery on his calf in three to five months and begin throwing off the mound in eight. 