Andrew Painter of the Philadelphia Phillies, Robert Hassell III from the Washington Nationals, and Spencer Jones of the New York Yankees are highlighted as top fantasy baseball prospects worth stashing. Painter, a promising right-handed pitcher, has rebounded from a rough start in Triple-A, showing strong potential with a recent 2.51 ERA over his last three outings. Hassell, an outfielder, has demonstrated significant production in the minors following a brief MLB stint, posting an impressive .455/.556/.955 line after returning. Meanwhile, Jones has shown power and speed, hitting .403 in his last 16 games with 8 home runs, though concerns about his high strikeout rate remain. These players could provide valuable contributions during the second half of the season, making them essential targets for fantasy managers.