I thought that either:
(a) The Rox had a three-station radio network (WJDA-1300, WBET-1460 and WATD-95.9), or.....
(b) The Rox' schedule was split among these three stations with each station broadcasting about one-third of the games.
This has to be the first year the Rox have somehow been on more than one radio station. In the past, I believe WBET did the entire schedule. Where I live in Norwood, I usually lose WBET (or at best get a very weak signal from them) after sunset when they change patterns and reduce power.
At my girlfriend's former home in Randolph, I got a good nighttime signal from WBET.
According to the Radio Locator.com signal-aea maps, there is almost no overlap between the nighttime signals of WBET and WJDA, so I could see both stations broadcasting night games. Both stations' night signals do have overlap with WATD.
The idea of multiple stations originating more than one broadcast of the same team's games isn't new. I once read that in the earliest days of radio, the Chicago Cubs' home games were sometimes on three or four different area stations, each with their own announcer. Then, WGN-720 got the games exclusively (and decades later, WGN's parent Tribune Communications would buy the team).