Armstrong (1-0) was credited with the victory in a win over the White Sox on Sunday, firing two scoreless innings during which he issued a walk and recorded four strikeouts.
Following a rocky early-season tenure with the Rays, Armstrong has looked like a different pitcher since returning to the big-league club Tuesday. The right-hander has allowed just a single hit -- a solo home run -- across five innings over three appearances while generating an impressive 8:1 K:BB.