Armstrong suffered multiple stab wounds and died at Inland Valley Medical Center in Wildomar.
The other man, a 23-year-old, was still listed in critical condition today, according to sheriff's homicide Detective Dean Spivacke.
Marvin "Marv" Black, 25, and James "Jamie" Fung, 29, both of San Diego, were arrested Monday, according to Spivacke.
Fung was being held at the Vista Detention Facility and Black was at the Southwest Detention Center. They were both booked on suspicion of murder, according to Spivacke.
A third man, identified only as "Matty" remained at large. He was described as about 5 feet 9 inches tall, with a medium build, short dark hair and a tattoo of the name "Anita" on his left ring finger.
According to witness accounts, the fight began as an argument inside the bar, and then "Matty" started brawling with Armstrong, Spivacke said.
The fight moved outside to an alley before the two men separated, Spivacke said.
"Matty" left the alley and then returned a few minutes later in his truck with Black and Fung, he said. They drove up, got out and began fighting again with Armstrong and two other men, Spivacke said.
"During the fight, it appears as though `Matty' stabbed Ryan to death," Spivacke said.
The name of the other hospitalized victim will not be released, the sergeant said.
The detective said that neither of the groups involved appeared to be gang members.
"There's no indication that these people knew each other," Spivacke said.
Armstrong's father, Ron Armstrong, is the founding pastor of Cornerstone Community Church in Wildomar.
A viewing was held at the church Wednesday.
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