After undergoing yet another MRI exam on top of countless X-rays and CT scans, Michael Wacha joked that if there were many more medical tests in his immediate future his body might start to glow. The right-hander, a top-of-the-rotation talent when healthy, is the St. Louis Cardinals' biggest offseason question mark on the pitching staff because of unknowns that come with an unusual injury called a stress reaction. He's not the only one, with ace Adam Wainwright coming off what the team terms minor elbow surgery and lefty Jaime Garcia iffy coming off unproven thoracic outlet surgery to relieve nerve compression. General manager John Mozeliak and team chairman Bill DeWitt both said at the team's Winter Warm-Up fan festival this weekend that they're not in the market for a high-dollar addition such as Max Scherzer or Cole Hamels. More...