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6/16/2014 11:52 P.M. ET

Astros' prospect Tropeano sharp in win

Righty allows two hits in seven scoreless for Triple-A Oklahoma

Entering Monday night's matchup between Triple-A Las Vegas and Oklahoma City, all eyes were on Noah Syndergaard -- the Las Vegas starting pitcher and Mets' No. 1 prospect -- as he returned from an injury to his non-throwing shoulder. But once the game started, it was Oklahoma City starter Nick Tropeano who attracted the attention.

Tropeano, the Astros' No. 16 prospect, allowed just two hits in seven scoreless innings, leading the RedHawks to a 5-1 victory.

Tropeano has won his last three starts and thrown at least seven innings in all three games. In that stretch, he is 3-0 with a 0.82 ERA and a 0.68 WHIP.

Overall this season, Tropeano is 5-4 and his 2.09 ERA ranks third in the Pacific Coast League. He has struck out 65 batters and walked 19 in 73 1/3 innings. It is a marked improvement on his 2013 season when he went 7-10 with a 4.11 ERA for Double-A Corpus Christi.

While Tropeano shined Monday, Syndergaard wasn't sharp in his return from the disabled list. Oklahoma City roughed him up for four runs on seven hits and a walk in four innings. He struck out three batters and threw 73 pitches.

Teddy Cahill is a reporter for MLB.com. Follow him on Twitter at @tedcahill. This story was not subject to the approval of Major League Baseball or its clubs.