Murphy delivered a two-run homer Wednesday night in the eighth inning of Game 4 of the National League Championship Series.
Murphy's blast marked his sixth straight postseason game with a homer, setting a major league record as the Mets beat the Chicago Cubs 8-3 for the sweep to advance to the World Series for the first time in 15 years.
Beltran went on to sign a seven-year, $119 million contract with the Mets that offseason.
Murphy will become a free agent after the World Series.
Information from The Associated Press was used in this report.