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8/29/2014 8:52 P.M. ET

Mariners prospect Diaz impresses in Class A victory

Right-hander Edwin Diaz, the Mariners' No. 7 prospect, threw five hitless innings and combined with two relievers for a one-hit shutout Friday, as the Class A Clinton LumberKings defeat the Quad Cities River Bandits, 1-0, in the first game of a doubleheader.

Diaz began the game by walking leadoff batter Marc Wik. After Wik was thrown out trying to steal second, Diaz issued walks to the next two batters as well. He escaped the early jam with a pair of strikeouts, the first of 14 straight batters he retired.

Diaz finished his outing with a season-high nine strikeouts and three walks in five innings.

Left-hander Paul Fry relieved Diaz to start the sixth inning. After a strikeout and a walk to start the inning, Quad Cities right fielder Ryan Bottger broke up the no-hitter with a one-out double. He nearly ended the shutout as well, but right fielder Tyler O'Neill and first baseman Jeff Zimmerman combined to throw out Wik, who was trying to score from first base after his second walk of the game.

After the double, right-hander Emilio Pagan came on for the final four outs. He struck out two batters and walked one to earn his 15th save of the season.

Diaz picked up the victory, improving to 6-8 with a 3.33 ERA. The 20-year old has struck out 111 batters and walked 42 in 116 1/3 innings this season.

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.