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Jamey "Never Quits" Carroll can't play SS and 2B simultaneously.
The Twins have had different starting middle infielders every since the Guzman-Rivas era of 2001 to 2004. Ever since then, the Twins have taken countless gambles on these two positions. Now in 2012, the trio of Dozier-Carroll-Casilla has taken the shared responsibility of covering Minnesota's middle infield.
While Jamey Carroll's games-to-error ratio, one error every six games, ranks third among AL second basemen who have played at least 50 games, Alexi Casilla is ranked ninth (out of 14) with one error every 11 games.
On the shortstop side of things, Carroll fares much better. At shortstop, Carroll is ranked the third best amongst players who have fielded the position at least a third of the season, committing an error once every 18 games.
Dozier is ranked the worst shortstop among AL players who have played the position 80 games, committing one error every 5.5 games.
Offensively the three have combined for .231/.289/.301 slash line, 107 runs and 30 stolen bases.
Modest offense and subpar fielding abilities indicate that the Twins need to reconsider their middle infield—especially Dozier and Casilla, who combined for a lousy .221/.260./.310 slash line.
Keep Carroll as the utility guy. Replace Casilla and Dozier.