Bryant was fined by the NBA for missing a news conference and Friday's league-mandated charity activity, a league spokesman confirmed.
A USA Today report said Bryant was fined $40,000 and Rondo and Pierce each were fined $20,000 for also missing the charity activity. The league would not confirm the amounts of the fines.
Asked about the fine after the Lakers' 88-85 overtime loss to the Detroit Pistons on Tuesday, Bryant said he hadn't been told of the fine yet and said, "I guess you're not allowed to be sick."
Ramona Shelburne is a columnist and a reporter for ESPNLosAngeles.com.