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Mason Barnett strikes out Ceddanne Rafaela swinging on a fastball to end the second inning
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Mason Barnett strikes out Trevor Story swinging to end the top of the 1st inning, keeping the game scoreless
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Mason Barnett strikes out eight batters over five solid innings of work on the mound in his first Major League win
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Mason Barnett fans Mike Trout for the first out of the bottom of the 5th and the eighth strikeout of his start
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Mason Barnett fans Bryce Teodosio, Zach Neto and Mike Trout in order to retire the side in the bottom of the 2nd
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Mason Barnett tosses four innings of work on the mound during his MLB debut for the Athletics
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Mason Barnett records his first Major League strikeout during the top of the 4th during his debut on the mound for the Athletics
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Athletics No. 9 prospect Mason Barnett strikes out nine in a strong start for Triple-A Las Vegas
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A's No. 10 prospect Mason Barnett racks up eight strikeouts over 4 1/3 innings for Triple-A Las Vegas
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Athletics No. 4 prospect Mason Barnett strikes out seven batters across five solid innings for Triple-A Las Vegas
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Athletics No. 4 prospect Mason Barnett strikes out eight over five strong innings for Triple-A Las Vegas
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Athletics No. 3 prospect Mason Barnett racks up eight strikeouts in five innings of one-run ball for Triple-A Las Vegas
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A's No. 6 prospect Mason Barnett strikes out eight batters in five innings for Double-A Midland in the Texas League Finals
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Athletics No. 6 prospect Mason Barnett strikes out his seventh batter in a scoreless six-inning start for Double-A Midland
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A's No. 6 prospect Mason Barnett polishes off seven scoreless frames with his nineth strikeout for Double-A Midland
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A's No. 6 prospect Mason Barnett polishes off six frames of one-run ball with his ninth K for Double-A Midland
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A's No. 6 prospect Mason Barnett gets his ninth strikeout of a quality start for Double-A Midland
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Athletics No. 6 prospect Mason Barnett ties his career high with his 10th strikeout over seven scoreless innings for Double-A Midland
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Royals No. 4 prospect Mason Barnett strikes out eight over six scoreless innings for Double-A Northwest Arkansas
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Royals No. 4 prospect Mason Barnett tosses his eighth strikeout and completes six innings of work for Double-A Northwest Arkansas
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Royals No. 5 prospect Mason Barnett strikes out the side en route to eight strikeouts in a five-inning start for Double-A Northwest Arkansas
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Royals No. 5 prospect Mason Barnett fans his fifth and final batter in five innings for Double-A Northwest Arkansas
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Royals No. 5 prospect Mason Barnett strikes out his fifth and final batter in a relief appearance for Double-A Northwest Arkansas
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Royals No. 5 prospect Mason Barnett fans all three hitters in the 3rd inning en route to a seven-K outing for Double-A Northwest Arkansas
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Royals No. 5 prospect Mason Barnett records 10 strikeouts over five innings for Double-A Northwest Arkansas
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Royals' No. 6 prospect Mason Barnett records his strikeout, capping off his an eight strikeout performance for Double-A Northwest Arkansas
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No. 13 Royals prospect Mason Barnett strikes out six over five solid innings for Double-A Northwest Arkansas
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No. 13 Royals prospect Mason Barnett strikes out six across five innings for Double-A Northwest Arkansas
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No. 13 Royals prospect Mason Barnett fans his 6th and final batter in four innings of one-run ball for Double-A Northwest Arkansas