"I consider myself a friend of A-Rod's and someone I had a lot of faith in and trusted and, I don't know, he's lied before when he did the '60 Minutes' deal and now he comes out ... and says 'Well, I did do it. But I only did it for two years.' Where does the circle of trust end here? It's a real bad story."
The former Royals star, who is vice president of baseball operations for the club, made the comments on "The Morning Sports Drive" on 610 Sports Radio KCSP.
"The one thing I am impressed with is he came right out and admitted it. But I don't think that that's going to -- I mean, God, the poor guy, his career's ruined," Brett said. "And, for what? Just trying to compete with everybody else."
Brett watched the Rodriguez interview on ESPN and noted that the player mentioned the pressure of his situation in 2003.
"There's no pressure on you if you sign a $250 million contract. What pressure do you have? It's guaranteed. You break your leg the next day and you get $250 million. There's no pressure in that," he said.
Brett remarked that now A-Rod, Barry Bonds and Roger Clemens have been linked to steroids and Pete Rose is barred from the Hall of Fame for gambling on baseball.
"Obviously these four people that I've just mentioned -- Clemens, Bonds, Pete Rose and A-Rod -- have not conducted themselves in a professional manner and, as a result, they might not get in the Hall of Fame," Brett said.
"For A-Rod, it's so far down the road that who knows what's going to happen. One thing that he did and he did the right thing is come out immediately -- none of this lying and keeping your silence or anything like that."
Brett also noted that the Royals open their home schedule this year against Rodriguez and the New York Yankees.
"Our first game is against the Yankees this year and we'll see how 40,000 people react to him when he comes on the field," he said.