sentences:  In 2001 the Trek deal proved painful for LeMond as he was forced by John Burke, the head of Trek, to apologize for the negative comments about Michele Ferrari, doping, and Lance Armstrong, who was by then a very important marketing force for Trek.LeMond's contract with Trek had a clause prohibiting LeMond from doing anything that would damage Trek.Burke reminded LeMond of this commitment, and strongly argued that LeMond publicly retract his statements.