David Ovalle of the Miami Herald reported the news, noting Holmes was pulled over prior to the arrest.
Each player posted bond after they spent a brief time in jail on Wednesday.
Andy Slater of 640 The Hurricane shared Holmes' mugshot and additional details:
Andy Slater @AndySlater
SLATER SCOOP: Phoenix Suns forward Richaun Holmes was arrested in S. Florida on Wednesday for marijuana possession. Holmes is accused of having a joint that was “hot and smoldering in a cupholder” next to him. He’s the second Suns player to be arrested in S. Fla. in 2 weeks https://t.co/GvpVP0q8mv
Holmes entered the league as a second-round pick of the Philadelphia 76ers in the 2015 NBA draft and played three seasons in the City of Brotherly Love before he was traded to Phoenix. He appeared in a career-high 70 games in 2018-19 for the Suns and averaged 8.2 points, 4.7 rebounds and 1.1 blocks a night while being used primarily as a backup to rookie Deandre Ayton.
Webb appeared in 10 games during the 2017-18 campaign for the Nets and averaged just 1.6 points a night.