Sumner was released by Charlotte on Tuesday, Shams Charania of The Athletic reports.
The Hornets signed Sumner to a one-year deal Friday, Adrian Wojnarowski of ESPN.com reports.
The Nets waived Sumner on Saturday, Ian Begley of SportsNet New York reports.
Sumner (hip) isn't listed on the Nets' injury report ahead of Saturday's Game 1 against Philadelphia, Alec Sturm of NetsDaily.com reports.
Sumner (hip) will not play in Sunday's game against Philadelphia.
Sumner (hip) has been listed as doubtful for Sunday's game against the 76ers.
Sumner (right hip contusion) is questionable for Sunday's game against the Nets, Alex Schiffer of The Athletic reports.
Sumner (hip) is available for Wednesday's game against the Rockets, Kristian Winfield of the New York Daily News reports.
Sumner (hip) is questionable for Wednesday's matchup against the Rockets.
Sumner (hip) has been ruled out for Sunday's game against the Magic, Kristian Winfield of the New York Daily News reports.