According to Mark DeRosa he is fine, but according to doctors DeRosa is not alright. DeRosa has been diagnosed with atrial arrhythmia. He is back in Chicago at the moment receiving treatment. For those of you who have no idea what atrial arrhythmia is the Chicago Tribune cleared it up a bit. They describe it as, "A type of irregular heartbeat doctors can correct with medication or a procedure with a heart catheter that involves burning off a pea-sized piece of heart tissue. The treatment has a 98 percent success rate and typically allows athletes to resume their normal routine within a couple of weeks." All that I know is that I want DeRosa, one of my favorite players on the Cubs, to be alright. For those of you who did not know this, Mark DeRosa is celebrating his birthday today, he will be turning 33.