Youth, energy, and one wild pace

Boston’s training camp looks nothing like last year. With Tatum sidelined and veterans gone, Joe Mazzulla leads a much younger squad, including Anfernee Simons, Chris Boucher, and rookies. Sam Cassell calls it the hardest camp he’s seen in 34 years.

Jaylen Brown is pushing team bonding off the court, while players grind on it daily. The vibe is fresh, intense and connected — and if practice ran any faster, someone would need to install traffic lights inside the Auerbach Center.