pitcher (n.1) Look up pitcher at Dictionary.com
"earthen jug," c.1200, from Old French pichier (12c.), altered from bichier, from Medieval Latin bicarium, probably from Greek bikos "earthen vessel" (see beaker). Pitcher-plant is recorded from 1819; so called for its resemblance.
pitcher (n.2) Look up pitcher at Dictionary.com
"one who pitches," 1722, agent noun from pitch (v.1). Originally of one tossing hay into a wagon, etc.; baseball sense first recorded 1845.