Guest host Joe Sullivan welcomes new Globe columnist, Tara Sullivan, to the show. They chat about the two times Tara went viral online, her take on the Yankees and Jets, and their shared affection for Bruce Springsteen. Then, T.D. Thornton, the voice of Suffolk Downs, joins to chat about the upcoming Breeders' Cup, gambling, and his career calling races.

Boston area listeners, join the Endless Thread team on July 25 for a behind-the-scenes look at our five-part series, "Infectious: The Strange Past and Surprising Present of Vaccines – And Anti-Vaxxers." Event info: https://wbur.fm/2XXJIts