The Cardinals and Lance Berkman have yet to disclose specifics about an injury caused by Berkman stretching for a routine throw from Rafael Furcal, but the veteran is unsure about his future as he awaits MRI results, writes Joe Strauss of the St. Louis Post-Dispatch."You think about it when you have a potentially major surgery at this stage of your career. But, again, right now we don't know what it is. But it gives you pause," the first baseman said. "I don't think it's one of those deals where you sit out a week and see where your are. I think it's much more serious than that."Berkman, 36, added that he wouldn't automatically call it a career if he has re-torn his ACL and that he is hopeful that he will be able to bounce back from his injury. The veteran is earning $12MM this season but has appeared in just 13 games thus far.For his career, Berkman owns a .296/.409/.546 slash line across 14 seasons and has earned more than $102MM in total, according to Baseball-Reference.