4. Royce Clayton - 2003: -1.3 WAR
Coming in at #4 on this list is Royce Clayton's 2003 season. Royce's career was all over the place and his offensive success was largely dictated by whether or not he randomly decided to hit above .260 in a given year or not. His defensive ability at shortstop resulted in him stringing together a 17 year career in the big leagues, but he sure put up his fair share of stinker seasons at the plate.
The worst season of Clayton's career by far was 2003 with Milwaukee. When a guy slashes .228/.301/.333 with 11 homers and doesn't put up his usual decent defensive performance, it is pretty rough. However, that season didn't stop Royce from finding gainful employment for another four seasons as he bounced around the league.
3. Tim Johnson - 1973: -1.4 WAR
Younger Brewers fans will probably not remember Tim Johnson and older Brewers fans probably wish they could. Johnson's best season in the big leagues came with the Brewers in 1976 where he managed to put up 1.4 rWAR in 306 plate appearances.
However, his rookie season was a bit of a disaster. Johnson was Milwaukee's everyday shortstop and after posting a .213/.259/.243 in 510 plate appearances, Milwaukee decided they needed to make a change at short after just one season. Fortunately for Milwaukee, they had just picked a young shortstop by the name of Robin Yount in the 1973 draft. At 18 years old, Yount would take Johnson's job at short and, well, the rest was history.