About 200 people packed inside the Negro Leagues Baseball Museum for the ceremony honoring the legendary O'Neil, a great ambassador to baseball and the NLBM who barnstormed with Satchel Paige with the Kansas City Monarchs. O'Neil was the first African-American coach in the Major Leagues.
The ceremony came on the 10th anniversary of O'Neil's death at the age of 94.
Speakers included Kansas City Mayor Sly James, NLBM president Bob Kendrick, Missouri state senators Jason Holsman and Ryan Silvey, Royals Hall of Famer Frank White and author Joe Posnanski, who wrote "The Soul of Baseball: A Road Trip Through Buck O'Neil's America."
"First of all, Buck would never believe this [ceremony would happen]," Posnanski said. "Second, he'd say, 'They're not going to blame me for the traffic, are they?' ... It was never about the honors with Buck. It was always about the people."
One honor that eluded O'Neil was not getting into the Baseball Hall of Fame.
"Buck helped so many Negro League players get into the Hall," White said. "But when he didn't get in, he took the high road."
The idea to rename the bridge was spawned by Holsman and Silvey, who had the idea to rename it in someone's honor over a year ago. And while they attended a Royals playoff game last season, there was a rain delay. They sat and watched a video tribute to O'Neil on the scoreboard during the delay.
That's when they turned to each other and said, "It's gotta be Buck."
Kendrick, one of O'Neil's closest friends, helped push the idea as well.
"To have this come on the 10th anniversary of Buck's passing," Kendrick said, "… It was one of the most difficult days in all of our lives ... but today, we are honored to have this bridge renamed for him."
Jeffrey Flanagan has covered the Royals since 1991, and for MLB.com since 2015. Follow him on Twitter @FlannyMLB. This story was not subject to the approval of Major League Baseball or its clubs.