On a rainy night at Shea Stadium, the seventh-inning line drive off the bat of Atlanta’s Marty Perez strikes Jon Matlack’s forehead so hard that the ball ricochets into the Mets dugout. Fortunately, the 23 year-old southpaw sustains only a hairline fracture of his skull, and will return to the mound on May 19 to blank the Bucs for six innings at Pittsburgh.