When Greg Marshall walked out of the College of Charleston yesterday, he was the head coach of a Cougars team in disarray. On his way to start packing, he was the head coach of the Winthrop Eagles again. What happened on the road trip home is cause for speculation. Coach Marshall said that after talking to his wife, a Charleston native, Rock Hill was home to him. After what was said to be a one-hour phone conversation yesterday with C of C officials, Marshall was re-introduced as Winthrop’s head basketball coach.