MEDFORD, Mass. -- With more than a month to digest his end-of-the-season struggles, Boston Celtics forward/center Glen Davis said Monday that he wasn't mentally ready for the postseason and has spent the start of a murky offseason exercising his mind.

After setting career highs while averaging 11.7 points and 5.4 rebounds over 29.5 minutes per game during the 2010-11 season, Davis disappeared in the playoffs, averaging a mere 4.9 points and 3.6 rebounds over 21.2 minutes per contest and the Celtics were eliminated by the Miami Heat in the Eastern Conference semifinals. While some pundits wondered whether Davis was physically prepared for the postseason, he suggested Monday it was all mental.

"(The postseason struggles) weighed on me a lot," Davis said during a community appearance in which the first of three deserving local families received a Celtics-themed court and bedroom makeover. "I pride myself on playing good basketball, especially when you need it. Every postseason I've played tremendously good, to the point where it was like, 'Wow.' But this summer it didn't happen because I felt, mentally, I wasn't ready and prepared enough for what was in front of me. I didn't prepare for it well mentally, and it affected the way I played. That's what I've been doing this offseason, concentrating on making sure that postseason won't happen again.

"This summer's a different summer for me as far as just growing fully and being who I can truly be as a person and in my game as a player. Mentally I've been exercising my mind because of what's about to happen. I've always said I need to work on a certain part of my game and this year mentally I wasn't there. My body was there, but I was not there mentally."

Davis never clarified exactly what was weighing on his mind, but lingering free-agent status surely was chief among them. Davis will be an unrestricted free agent on July 1 and, particularly with a potential lockout looming, his future is very much up in the air. A new collective bargaining agreement would help determine whether his basketball address will change, but Davis said he's not worrying about what he can't control.

What Davis is worrying about is making sure he can be himself wherever he plays his next basketball.