Kaprielian made his major league debut last Aug. 16, and has been a rotation regular this season for A.L. West-leading Oakland, which improved to 13-2 in June. He struck out four of his first five batters, threw 44 four-seam fastballs that averaged 93 miles per hour and mixed in 22 sliders, two curveballs and 12 changeups.
On the first night coronavirus attendance restrictions were lifted in the Bronx, Kaprielian (4-1) got to pitch before a crowd of 24,037 at Yankee Stadium.
With the A’s wearing kelly green jerseys for a rare road game, he allowed three runs, struck out seven and walked one.
The Yankees had won three straight games when trailing after six innings but fell short in doing it for the fourth game in a row, something the team did last as the Highlanders from May 17-20, 1910, according to STATS.
Yusmeiro Petit allowed one hit in one and a third innings, Jake Diekman pitched a hitless eighth and Lou Trevino completed the four-hitter for his 12th save in 14 chances.