Last Tuesday, Kinsler called Hernandez a bad umpire who is "messing with baseball games, blatantly," adding: "He needs to find another job, he really does."
On Saturday, some umpires across Major League Baseball wore white wristbands as a show of solidarity after Kinsler was not suspended.
Major League Baseball notified the umpires in writing that the wristband protest would lead to fines, industry sources tell Olney.
On Sunday, the umpires ended their protest. Commissioner Rob Manfred offered to meet with their union's governing board.
Kinsler never backed down from his comments, saying Friday that he was fined but that he had no regrets about what he said.
Tigers manager Brad Ausmus called the fine the biggest he's seen during his career.
"To act like Ian Kinsler just got fined. It's the biggest fine I've ever seen Major League Baseball give a player," Ausmus said Saturday. "So I don't want to hear -- I don't want them to minimize -- that he's not being punished."