Robertson was selected in the seventh round of the 2001 NFL draft by the Buffalo Bills.
[1][2] He played in twelve games during his rookie season, recording two sacks and 26 total tackles.
[3] Robertson's suspension ended on October 28, 2002, and he was subsequently placed on the team's reserve/non-football illness list, where he spent six weeks.
On December 10, 2002, the NFL announced that Robertson was suspended for one year for another violation of the substance abuse policy.
This biographical article relating to an American football defensive lineman born in the 1970s is a stub.