OAKLAND ATHLETICS — Reinstated INF-OF Ben Zobrist from the 15-day DL. TEXAS RANGERS — Activated OF Josh Hamilton from the 15-day DL. Placed RHP Neftali Feliz has been placed on the 15-day disabled list, retroactive to May 20. PITTSBURGH PIRATES — Activated RHP Charlie Morton from the 15-day DL. UMASS — Named Tom McElroy senior associate director of athletics for external relations.