Sebastian Telfair is now behind bars ... TMZ Sports has learned the former NBA star has officially begun his prison sentence.

Trump ... you’re definitely going to want to pardon me," former Celtics player Sebastian Telfair said this week.

Sebastian Telfair asks Donald Trump for a pardon hours before serving six months in prison for violating a plea agreement.

Former NBA star Sebastian Telfair pleaded for a pardon from President Donald Trump as he's set to enter prison for violating ...

Former Brooklyn hoops star Sebastian Telfair is calling on President Donald Trump to give him a last-second pardon before he ...

Sebastian Telfair, who played 106 games for the Phoenix Suns from 2011-13, is seeking a presidential pardon ahead of his ...

Brooklyn high school star and former NBA player Sebastian Telfair wants President Trump to keep him out of prison with a last ...

Telfair was among several former NBA players allegedly caught trying to scam the league's health care plan out of nearly $4 ...

Former NBA player Sebastian Telfair is pleading for President Donald Trump to pardon him and keep him from going to prison.

Former NBA star Sebastian Telfair asked President Donald Trump to grant him a pardon before reporting to prison.

Sebastian Telfair is preparing to serve six months in prison but is hoping for some help from President Donald Trump. Telfair ...

Longtime NBA player Sebastian Telfair, who was scheduled to begin serving a prison sentence Tuesday, asked President Donald ...