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6/20/2014 11:05 P.M. ET

Owens turns in yet another gem for Sea Dogs

Top prospect Henry Owens threw a seven-inning shutout as Double-A Portland defeated Altoona, 3-0, in the second game of a doubleheader Friday.

Owens, ranked No. 26 on MLBPipeline.com's Top 100 Prospects list, struck out eight batters and held Altoona to five hits and two walks. The left-hander induced eight ground balls and threw 98 pitches.

Since games in Minor League doubleheaders are limited to seven innings, Owens got credit for his second shutout this season. His first was an Opening Day no-hitter that was shortened to six innings because of rain.

Owens has thrown at least seven scoreless innings in four of his past five starts. The lone exception was last Saturday, when he allowed one run in 6 2/3 innings at Akron. During that stretch, which dates back to May 24, he is 5-0 with a 0.25 ERA and 32 strikeouts in 35 2/3 innings.

Owen's dominance isn't limited to the last month. With Friday's victory, he improved to 9-3 with a 1.99 ERA this season. He has struck out 89 batters and walked 35 in 86 innings. He leads the Eastern League in wins, ERA, strikeouts, WHIP (1.03) and complete games (three).

The first game of the doubleheader was the completion of Thursday's game, which was suspended in the third inning. Portland also won that game, 4-2. Catcher Blake Swihart, the Red Sox's No. 3 prospect and No. 51 overall, scored twice and drew three walks in the doubleheader.

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.