Feb 15, 2010 6:36 AM EST

Daisuke Matsuzaka is working hard to repair his relationship with the Red Sox this month.

The pitcher admitted hiding a groin strain from Boston trainers and officials last season.

Matsuzaka reported early to the team's spring training camp in Fort Myers, Fla., and appears to be in much better condition than last season.

"He worked hard this winter, that's evident," general manager Theo Epstein told the Boston Globe. "He has lost weight."

Via Yahoo! Sports