ST. LOUIS — Into the breach of injured Cardinals starters and tired relievers Monday night marched Adam Wainwright, two months short of 41 years. The 17-season veteran knew he was going to be on the mound for six or seven innings, for 100 or so pitches, no matter the score. As long as he was going to be out there that long, Wainwright surely must have determined that there was no reason for the Miami Marlins to score. Wainwright scattered seven hits over the first five innings. He also struck out seven in that time. Then he put the hammer down, retiring the final seven men he faced, By the tim…