In Week 12 of the fantasy baseball season, multi-position eligibility is a significant asset. Willi Castro of the Minnesota Twins, despite being slightly above the rostered threshold, has seen a surge in performance, making him a hot target. His eligibility at multiple positions increases his utility on fantasy rosters, especially with favorable matchups against the Reds.

Jose Caballero, playing for the Tampa Bay Rays, is another strong candidate, especially for managers seeking stolen bases. Despite a low batting average, his speed on the bases has made him a valuable asset lately.

In deeper leagues, keep an eye on Marcelo Mayer of the Boston Red Sox, who has shown promise since his promotion, and Hyeseong Kim of the Los Angeles Dodgers, who can contribute across various categories. Lastly, for the deepest leagues, Otto Lopez and DJ LeMahieu are worth considering as they display potential for significant contributions alongside favorable matchups.