From Card Player In what could be his last main event ever, poker legend Doyle Brunson had quite a run. Brunson entered Day 4 with about 700,000, but failed to get anything going through the first six hours or so of the day. He was down to his last 290,000 when his elimination hand occurred. With blinds at 4,000-8,000, a player opened to 16,000 in early position. Another player called, and Brunson raised to 86,000. The action folded to the original raiser, who elected to fold as well. The player in the middle shoved, and Brunson called off his last…