The team issued a statement Thursday saying that the 50-year-old Ainge was "recovering nicely" at Massachusetts General Hospital and is expected to remain there for a few days.
Ainge was a guard on two of the Celtics championship teams in the 1980s and took charge of the team's basketball operations in 2003. He engineered trades last year for Kevin Garnett and Ray Allen, paving the way for the team to win its first NBA title since 1986.
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New ESPN president Jimmy Pitaro told reporters Friday that the network does not plan to televise the national anthem as part of its Monday Night Football broadcasts this season.