ESPN, citing anonymous team sources, reported that Boozer suffered the injury after tripping over a bag inside his house.
Boozer was Chicago's high-priced free agent pick-up this summer, having signed a five-year contract worth $75 million. Boozer has a record of injuries, though this fracture seems completely unrelated to previous maladies. Boozer played 78 of 82 games last season, but missed 45 games in 2008-09. Over the course of six seasons in Utah, Boozer played in just over 70 percent of his potential games, a fairly low number.
New Bulls coach Tom Thibodeau does have last season's most common starting frontcourt -- Joakim Noah and Taj Gibson -- available. But Boozer was seen as the potent interior scorer the Bulls have for so long lacked, and a perfect complement to slashing point guard Derrick Rose and mid-range magician Luol Deng. Without Boozer for several weeks, the Bulls offense will rely heavily on Rose's playmaking to put points up.
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The Bulls also signed Turkish center Omer Asik this offseason, and he would appear set to receive an early opportunity in Boozer's absence. Chicago has a rough early schedule, with Boozer likely to miss the Bulls' late November road trip through Houston, San Antonio, Dallas, L.A. for the Lakers, Phoenix, Denver and Sacramento.
Chicago figures to contend with the Milwaukee Bucks at the top of the Central Division. The Bulls made the playoffs as the eighth seed under Vinny Del Negro last season. The Cavaliers knocked them out of the first round with a 4-1 series win.
Boozer had spent his previous six seasons with the Jazz, but left as an unrestricted free agent in July. Utah replaced him with longtime understudy Paul Millsap, and augmented its frontline by adding Al Jefferson via trade.