‘“There was a little bit, because you never know,” Sweeney said Wednesday in an interview with The Buffalo News when asked if he feared his career might be over. “I mean, with this, you still don’t know. It’s a completely new thing. There was a level of it, but the cardiologists here we talked to were great and just real positive about it. I felt really comfortable with what they wanted me to do, but there was definitely a level of concern. Naturally, when you get told something like this, the heart is different than something else that keeps you off the field in football.”’