Nathan Karns is excited about an opportunity to open the season in Tampa Bay's pitching rotation. The Rays right-hander had a rough outing during a 9-6 loss to the Boston Red Sox on Saturday. Still, he feels good about his overall progress this spring. Read more http://scores.espn.go.com/mlb/recap?gameId=350328130&teams=boston-red-sox-vs-tampa-bay-rays