Dallas Mavericks forward Shawn Marion (0) blocks a shot by Boston Celtics guard Rajon Rondo (9) during the first quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Boston Celtics guard Rajon Rondo, center, is caught against a pick by Dallas Mavericks forward Shawn Marion (0) as guard O.J. Mayo (32) drives with the ball during the first quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Boston Celtics forward Chris Wilcox (44) goes to the basket against Dallas Mavericks forward Shawn Marion (0) during the first quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Dallas Mavericks guard Vince Carter, left, comes up with a loose rebound against Boston Celtics power forward Jeff Green (8) as Mavericks forward Elton Brand, second from right, and guard Darren Collison (4) watch during the first quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Boston Celtics forward Paul Pierce (34) shoots as he is fouled by Dallas Mavericks guard Darren Collison (4) during the second quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Dallas Mavericks head coach Rick Carlisle yells from the sidelines during the second quarter of an NBA basketball game against the Boston Celtics in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Boston Celtics guard Rajon Rondo (9) handles the ball against Dallas Mavericks shooting guard O.J. Mayo (32) during the second quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. (AP Photo/Elise Amendola)

Dallas Mavericks guard O.J. Mayo (32) loses the ball to Boston Celtics forward Kevin Garnett (5) as guard Rajon Rondo (9) watches during the second overtime period of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. The Celtics won 117-115. (AP Photo/Elise Amendola)

Dallas Mavericks guard O.J. Mayo (32) reacts as he loses control of the ball while Boston Celtics guard Rajon Rondo watches from behind during the second overtime period of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. The Celtics won 117-115. (AP Photo/Elise Amendola)

Dallas Mavericks forward Dirk Nowitzki, left, yells from the bench as guard Vince Carter (25) runs upcourt during the second half of an NBA basketball game against the Boston Celtics in Boston, Wednesday, Dec. 12, 2012. The Celtics won 117-115 in double overtime. (AP Photo/Elise Amendola)

Dallas Mavericks guard Derek Fisher (6) reaches for the ball as Boston Celtics forward Paul Pierce (34) tries to keep control during the fourth quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. The Celtics won 117-115 in double overtime. (AP Photo/Elise Amendola)

Boston Celtics guard Rajon Rondo (9) reaches for the ball as Dallas Mavericks guard O.J. Mayo (32) drives to the basket during the first overtime of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. The Celtics won 117-115 in double overtime. (AP Photo/Elise Amendola)

Dallas Mavericks guard Derek Fisher (6) loses control of the ball between Boston Celtics forward Kevin Garnett (5) and guard Jason Terry (4) during the fourth quarter of an NBA basketball game in Boston, Wednesday, Dec. 12, 2012. The Celtics won 117-115 in double overtime. (AP Photo/Elise Amendola)