An amazingly named baseball player (though he was not the behemoth you would have expected), Moose Haas was a Milwaukee Brewer for ten of twelve of his MLB seasons.  Haas was a decent control pitcher who would finish in the top ten in BB9 four times and ERA and FIP twice.  He would have 16 Wins in 1980, the season in which he led the American League in Winning Percentage.  Haas would have a record of 91-79 with an even 800 Strikeouts.

Realistically, B.J. Surhoff accomplished more with the Baltimore Orioles, but B.J. Surhoff was a Milwaukee Brewer for his first nine MLB seasons, the last of which saw him bat .320.  Surhoff would accumulate 1,062 Hits as a Brewer with only 323 Strikeouts.

Jim Slaton was a key Starting Pitcher for Milwaukee through the 1970s and as of this writing still holds the team record for Wins and Innings Pitched.  Slaton won 10 or more Games in nine seasons and went to the All-Star Game in 1977.  He also has a World Series win in their lone appearance in the Fall Classic, which was during his second Brewers run when he moved to the bullpen.

With Milwaukee, Slaton pitched in 268 Games and had a record of 117-121.

The best run of Jeromy Burnitz’ career was the five years and change (1996-2001) he spent as a Milwaukee Brewer.  Burnitz would smack 30 Home Runs four years in a row, earning MVP votes in two of them, and going to the All-Star Game in one.  He would hit 165 Home Runs as a Brewer and was one of the few highlights on Brewers teams that were generally not very good.

With Milwaukee, Burnitz had 165 Home Runs, 714 Hits with a .258 Batting Average.