Read on to find out why Diamond came out for this event and to watch him lead the crowd in the team’s favorite song. READ THIS NEXT: This Is the Most Hated Rock Band of All Time, According to Data. For 20 years, it has been a tradition for “Sweet Caroline” to play in middle of the eighth inning during games at Fenway Park. The last time Diamond himself performed the song at the stadium was in 2013 after the Boston Marathon bombing, as reported by Boston.com. During the performance at Saturday’s game, Diamond was joined in singing his popular song by actor Will Swenson, who stars as Diamond in the upcoming musical A Beautiful Noise, based on the singer’s life. The show will premiere in Boston on June 21 before moving to Broadway in the fall. Diamond re-tweeted a video of himself and Swenson performing and wrote, “Thank you @thewillswenson and the cast of @beautifulnoise for joining me in singing last night at Fenway! ‘Good times never seemed so good!’” Diamond doesn’t post on Twitter often, and most of his recent tweets are in promotion of the musical. Unfortunately for Boston fans, the Red Sox lost the game against the St. Louis Cardinals 11-2. Diamond is a New Yorker, not a Bostonian. The reason “Sweet Caroline” is connected to the Boston Red Sox is simply because fans love the song so much. As explained by the Major League Baseball website, the song was sometimes played during games starting in the late ’90s, but when Charles Steinberg joined as the executive vice president of public affairs, he suggested that it be played during every game at the bottom of the eighth inning—whether or not the Red Sox were winning—because it alway got the crowd so excited. “I said, ‘I think the song may have transformative powers and it may be able to lift the melancholy crowd and lift the spirits to being positive,’” Steinberg said, according to MLB.com. “We were talking about change in an organization that didn’t have any change. I said, ‘Let’s do it.’ Sometimes they were playing at the end of seven. Sometimes they were playing at the end of eight. Sometimes they were playing at the middle of the eighth. I wanted it to be the middle of the eighth, because you want your more festive songs to occur when the home team is coming up to bat. So we started playing it each day in 2002.“ae0fcc31ae342fd3a1346ebb1f342fcb For more celebrity news sent right to your inbox, sign up for our daily newsletter. In January 2018, Diamond announced that he was retiring from touring following being diagnosed with the nervous system disorder, Parkinson’s disease. “It is with great reluctance and disappointment that I announce my retirement from concert touring. I have been so honored to bring my shows to the public for the past 50 years,” he said in a statement on his website. Diamond added, “I plan to remain active in writing, recording and other projects for a long time to come.” Since his retirement, Diamond has resurfaced for a few special performances. For instance, in 2020, he performed at the Keep Memory Alive Power of Love Gala where he was being honored. The organization supports the Lou Ruvo Center for Brain Health at Cleveland Clinic Nevada. “I’m feeling great,” Diamond told People at the time. “This is an important thing they’re doing and I feel honored to be part of it and take part in it.” READ THIS NEXT: 30 Artists Who Haven’t Won Grammys.