Borkowksi, who posted a 1-1 record and a 2.29 ERA in 12 appearances -- one start -- in June for Triple-A Round Rock, joins 17 other players from the Astros' Minor League teams with Player of the Month honors.
Second baseman David Newhan, who joined the Astros on June 27 when second baseman Kazuo Matsui was put on the disabled list, was named Express Offensive Player of the Month, hitting .457 with five home runs and 17 RBIs.
Outfielder Ray Sadler was the Defensive Player of the Month, following a 1.000 fielding percentage through 37 games this season.
In Double-A Corpus Christi, lefty Polin Trinidad was named Pitcher of the Month for his 2.51 ERA and 2-1 June record, his second time winning the honor. He previously won it for Class A Salem in April.
Third baseman Chris Johnson was named Offensive Player of the Month for Double-A Corpus Christi with a .371 average, 10 doubles, six home runs and 23 RBIs, and shortstop Wladimir Sutil got the Defensive Player of the Month for his 39 putouts and 76 assists.
In Class A Salem, Jason Dominguez did not allow an earned run in 16 innings, with 10 strikeouts in nine relief appearances for the Avalanche for the pitching honors at that level. First baseman Mark Ori hit .365 with eight doubles for 22 RBIs and 11 runs scored for his second Offensive Player of the Month Award this season. Shortstop Tim Torres, with 242 assists and 113 putouts in 66 games, was named Defensive Player of the Month.
Right-hander Jay Pacella (2.65 ERA and one save in eight games), outfielder Brian Pellegrini (.271 with 16 runs scored, 10 home runs and 23 RBIs) and outfielder Steven Brown (.978 fielding percentage with 128 putouts) received the awards from Class A Lexington.
Krysten Oliphant is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.