Gone from the team are coach Doc Rivers (a former NBA point guard) and veteran Kevin Garnett, who mentored Rondo. The team is reportedly concerned with how Rondo will get along with first-year coach Brad Stevens.
Rondo said he was "open" to Stevens' approach, and the two spoke right after the Celtics hired the former Butler coach.
But the Boston Globe's Gary Washburn tweeted Sunday: "NBA source familiar with #celtics say team desperately needs another asst coach who can bond with Rondo, someone he can relate to and trust."
Rondo is still recovering from ACL surgery from last season. He is expected to be ready for the start of this season.
Los Angeles Lakers star Kobe Bryant is running.
Bryant showed evidence of his progress in recovering from an Achilles tear by posting a video on Instagram of him running on a treadmill.
Bryant was injured in April. While it typically takes a significant amount of time to recover from the injury -- and many have struggled to fully recover -- Bryant has vowed to be ready by the start of the regular season in late October.
Bryant is entering the final year of his contract with the Lakers.
The Charlotte Bobcats announced that they signed free agent forward Anthony Tolliver.
Terms of the deal were not disclosed.
Tolliver, 6-foot-8, averaged 4.1 points and 2.5 rebounds in 15.5 minutes over 62 games last season with the Atlanta Hawks.