the time) reportedly would have transformed either WBMX, WZLX, or WODS into Jack FM on April 15, 2005. Following the Boston Red Sox victory in the 2007 World Series, the station re-branded itself as "Mike Lowell FM" after the third baseman for one day. Similarly, the station paid tribute to Michael Jackson in July 2009 by re-branding themselves as "Michael FM" and playing Jackson's songs for the afternoon on the anniversary of his death. Sports WEEI-FM (2011–present) On September 8, 2011, it was announced that WMKK would begin simulcasting WEEI's sports radio format on September 12, 2011. The switch took place at 6:00 a.m. that day, after the station played Lynyrd Skynyrd's "Free Bird". On September 21, 2011, WMKK changed its call letters to WEEI-FM. On October 4, 2012, WEEI and WEEI-FM split the simulcast; the existing local programming and sports broadcasts remain on WEEI-FM, while AM 850 aired a redirection loop for one day before becoming a full ESPN Radio affiliate on October 5, 2012. J.T. The Brick's Fox Sports Radio program was added to WEEI-FM's schedule on May 6, 2013. (The program, along with other Fox Sports Radio programming, had moved from WEEI AM to WBZ-FM after WEEI began carrying a partial ESPN Radio schedule in 2009, but was dropped from WBZ-FM following the launch of CBS Sports Radio in January 2013). On August 20, 2013, WEEI-FM announced that it would no longer carry Boston Celtics broadcasts after being unable to reach a new contract with the team. In early 2014, WEEI-FM dropped Fox Sports Radio and began carrying NBC Sports Radio's overnight program, shortly after WUFC (now WMEX) dropped its affiliation with that network. SB Nation Radio's overnight show joined WEEI-FM's schedule in 2019, the move came after NBC Sports Radio eliminated its late night programming. SB Nation Radio was replaced by CBS Sports Radio later that year, after WBZ-FM dropped the latter network to rejoin Fox Sports Radio; Entercom had acquired CBS Sports Radio in its merger with CBS Radio. The station's HD2 channel carries an active rock format branded as "WAAF", which is also broadcast on the HD2 channel of sister station WWBX. The format and WAAF call letters were formerly used by WKVB (107.3 FM) until its 2020 sale from Entercom to the Educational Media Foundation, with a simulcast on the two HD2 channels (WAAF, in turn, carried WEEI-FM's programming on its HD2). Until