Sources have told the New York Daily News that Tom Glavine has experienced coldness in a finger on his pitching hand, and that the cause of the alarming condition isn't yet known. The 287-game winner is scheduled for a CT scan tomorrow, while an angiogram is planned for Wednesday. Doctors are unsure whether the problem is related to a blood clot or possibly a "knot" in an artery near his left shoulder. Depending on the diagnosis, Glavine could miss little time or the rest of the season. The "knot" could require invasive surgery, while a clot might be able to be dissolved and limit the time lost.