Moments after his parents were asked if this was an emotional day for them on the Marlins broadcast, Diaz rocketed a 422-foot bomb off a Jacob deGrom fastball at Citi Field -- prompting Diaz's father, Raul, to loudly cheer his son as he trotted around the bases for the first time in the majors.
"Did we just homer off deGrom?" Raul Diaz asked in disbelief at the conclusion of the interview. "... He's a Cy Young [winner]! We just homered against deGrom!"
Diaz finished the day 1-for-4, his lone hit a memorable solo home run.
The Associated Press contributed to this report.