Speaking to WEEI.com on the World Baseball Classic [1] and how he approached the event many blame for his slow start, Daisuke Matsuzaka said, "I don't really have any regrets how I prepared for the tournament or the season." Matsuzaka went on to explain that he feels better physically than when he went on the 15-day disabled list, but the fact he still doesn't have a win after collecting 18 last season is a frustration.
Links:
[1] http://www.weei.com/sports/boston/red-sox/rob-bradford/2009/06/02/daisuke-has-no-regrets