Celtics begin camp with revamped roster as Tatum sidelined

The Boston Celtics opened training camp Tuesday at the Auerbach Center with a heavily reworked roster and superstar Jayson Tatum sidelined as he recovers from a torn Achilles sustained in last season's playoffs. The club released a 21-player camp roster Monday and began practices focused on a faster style of play as coaches and players adjust to the absence of several veteran rotation pieces.

Boston enters camp carrying 14 players on guaranteed contracts and three two-way deals, with one 15-man roster spot still available. The offseason overhaul saw Jrue Holiday, Kristaps Porzingis and Luke Kornet leave via trade or free agency and Al Horford depart in free agency, while the team added veterans and role players including Anfernee Simons, Chris Boucher, Luka Garza, Josh Minott and first-round pick Hugo Gonzalez. Coach Joe Mazzulla, returning for his fourth season, is charged with integrating the new arrivals and reshaping the rotation without Tatum for the foreseeable future.

Practice on Tuesday emphasized pace. Forward Xavier Tillman likened the tempo to a NASCAR pit stop, saying, "You just don't stop moving. As soon as you go in, the guys are like, exchange, exchange, and we're...