In 1958, Putnam purchased a defunct station in Worcester, WWOR-TV (no relation to the current Secaucus, New Jersey/Tri-State station with the same callsign), and returned it to the air as a second full-time satellite of WWLP. However, Worcester is part of the Boston market, and WWLP was forced to limit WWOR's broadcast day to only six hours in order to protect the interests of WBZ-TV, then Boston's NBC affiliate. In 1964, WWOR changed its calls to WJZB-TV and became an independent station while continuing to simulcast some programming from WWLP.