When former unified lightweight titleholder Nate Campbell announced his retirement in November, he did so with a heartfelt statement a few days after a shocking eight-round decision loss to journeyman Walter Estrada. "I know it's time for me to hang it up," Campbell said at the time. "I've reached the point where I can still see the openings, but I just can't get my shots there in time. In this business, a tenth of a second delay is too much. ... If I do struggle in fights like this, then what would that mean for me against a top-tier fighter? I didn't enter this sport to be anyone's opponent. I entered this sport to become a world champion. I am fortunate that I was able to accomplish that goal. I would have liked to continue on to win titles in other divisions. However, when your body tells you that it's time to go, then it's time to go." Read more: http://sports.espn.go.com/sports/boxing/news/story?id=6252463
