The suspect in the fatal stabbing of a Dodgers fan in San Francisco this week was released from county jail late Friday, after prosecutors said there wasn’t sufficient evidence to charge the man.

Michael Montgomery, 21, was released shortly after 9 p.m., according to the San Francisco Sheriff's Department. He was one of two men held for questioning after the stabbing death of Jonathan Denver, 24, following a Dodgers-Giants game Wednesday.

Denver, who was dressed in Dodgers apparel, was stabbed during an altercation with a group of Giants fans over the teams' rivalry, police said.

PHOTOS: Fatal stabbing of Dodgers fan near AT&T Park

Montgomery was booked into county jail Thursday afternoon, after San Francisco Police Chief Greg Suhr said the man had “implicated himself” during questioning. Police said Friday they were still looking to interview two others who were with Montgomery on the night of the stabbing.

Montgomery’s father, Marty Montgomery, told media outlets his son phoned him sobbing from police custody to say he had stabbed Denver in self-defense.

Just hours after receiving the case from police Friday, San Francisco Dist. Atty. George Gascon announced in a statement that there wasn’t enough evidence to bring charges against Montgomery.

Gascon said that his office had an obligation to “prove beyond a reasonable doubt that the defendant did not act in lawful self-defense.”

Gascon said his office had requested that police interview independent witnesses and collect additional evidence before prosecutors can decide whether to file charges.

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Twitter: @vicjkim

victoria.kim@latimes.com