Blewett (1-0) earned the win in Thursday's 7-4 victory over the Mariners. He allowed two hits and no walks while striking out four over two scoreless innings.
With starter Jack Perkins lasting just three innings, Blewett entered in the fourth frame and delivered two scoreless innings to earn the win. Since being designated for assignment and traded by the Cardinals in late July, the right-hander has posted a 2.70 ERA, 1.29 WHIP and 22:6 K:BB across 23.1 innings with the Athletics.