Roberts defended his decision to fire Stone, saying the tie was "salting the wounds" from the Bears' 21-14 playoff loss Sunday to the arch-rival Packers.
"We spend $20,000 a month on advertising with the Bears on WBBM during the season, and we have Bears players including Corey Wootten driving loaner vehicles, and here was a salesman openly undoing that work," Roberts said.
Stone, a father of two who worked for Webb Chevrolet for a month and a half, said he was outraged to be fired over a tie.
"I was just showing my love for my team and it was a nice, smart tie that matched my clothes -- none of the customers minded: they had a sense of humor about it," he said.
He told the newspaper he hadn't decided yet whether to accept the job offer from Cesario.
Cesario said salesmen at his dealership routinely sport colors of out-of-town teams.
