Kaprielian was optioned to Triple-A Las Vegas on Thursday, Evan Webeck of The San Jose Mercury News reports.
The 26-year-old was one of six total Athletics pitchers removed from big-league camp Thursday. Kaprielian posted an impressive 1.63 ERA, 0.96 WHIP and 26:8 K:BB across 27.2 innings (five starts) with Double-A Midland during 2019.