Bengie Molina was on the call as his younger brother Yadier hit a home run and a walk-off double to give the Cardinals the victory.
"I started just yelling in the background," Bengie said of the game-winner. "I didn't know what to do. I was so happy, I just didn't know what to do. It's a dream, man, it really is."
As Yadier rounded third after his home run, he pointed up to the broadcast booth, and Bengie pointed right back at him.
"I can't wait to listen to [the call]," Yadier said. "I'm happy for him, and I'm happy we got the win for him."
"Man, I didn't know if I should cry, laugh, I really didn't," Bengie added. "It's so much joy for me, but also for him. He's been battling all year."
But the moment also went beyond family ties. The broadcast was available on La Ke Buena Spanish internet radio, KMOX's sister-station Sports Radio 98.1 HD3, cardinals.com and the MLB.com At Bat mobile app, giving some listeners a chance to hear a game in their native language, perhaps for the first time.
"It's very significant," Bengie said. "I think it's very important for the Hispanic population that we have here, I don't care if it's small or if it's big. I think it's very important for them to hear it in their own language, and not only for the good games but also so they can start loving the game if they don't already."
The Cardinals also launched their own Spanish-language Twitter account, @cardinales, earlier this season, which amassed more than 1,000 followers in its first month. La Ke Buena will also broadcast Friday night's game against the Pirates.
"God had a reason for us to be here for the first Hispanic show ever in Cardinal history," Bengie said. "To end up like this, it's just amazing."
Yadier's home run also gave him his 700th career RBI. He has hit three home runs in September, more than any other month this season after turning 34 earlier this summer. He has now hit safely in 14 of his last 15 games and leads all Major League catchers with 158 hits.
Manager Mike Matheny was 33 when Molina took over catching duties from him.
"He's worked hard to have his body in position and to play his best baseball at the end of September," Matheny said. "Everything he's doing looks right right now. That's why he puts in the effort that he puts in."
Nick Krueger is a reporter for MLB.com based in St. Louis.