The Mets promoted top prospects Marco Vargas and Ronald Hernandez to Low-A St. Lucie, the organization's Florida Complex League team announced Friday.

New York acquired the infielder and catcher from the Miami Marlins in the July 28 trade for David Robertson.

Vargas, 18, slashed .269/.434/.401 with two home runs and 24 RBI in 48 Florida Complex League games this season.

The 19-year-old Hernandez, meanwhile, slashed .295/.476/.460 with four home runs and 36 RBI in 45 games at the same level this year.

MLB Pipeline ranks Vargas (No. 8) and Hernandez (No. 20) among the Mets' top 30 prospects.

SNY's Joe DeMayo updated his ranking of the Mets' top 20 prospects Aug. 4 and ranked Vargas 10th.

"The top piece in the David Robertson deal," DeMayo wrote. "The Mets were very excited to land Vargas. Playing in the Florida Complex League, the Mets have had eyes on Vargas from scouts as well as player development staff as he routinely played games in the St. Lucie back fields. He has plus bat-to-ball skills and borderline elite plate discipline for his age.

"Over the last decade, he is in the top five in minor league strikeout/walk ratio. His power will likely be more doubles based and he projects as a second baseman. He is a possible everyday player but is just a long way from it."