He's saying the Yankees are a selfish team playing for their own contracts or money or... whatever! I don't think Murph cares, but it was clearly a shot at the Yankees and... so what! We're the Brewers, we don't care what the big market think anymore!
By the time Jesus Makes another Jesus Made(so Jesus Made Jr)... the way I figure it, we're going to be closing in on their World Series total!
If people actually read the ESPN article, it has the full quote with a key distinction that's being missed here:
"You're going to be a rich f---er," Murphy told Bauers, who is scheduled to become a free agent this offseason. "Just remember when you were on that horses--- Yankees team and you guys were all playing for yourself? Just remember, say, 'This is the way we used to do it.'"
It goes on to note that a number of other players have criticized that same team. This wasn't referencing Bauers going to the Yankees in the future.