George Kirby with his AA debut tonight for the @ARTravs. Catch his full first inning here, 3 up 3 down, 14 pitches. Fastball popping 🔥 at 98-99! @Mariners @MiLBMariners @LookoutLanding @gkirb98 @EddyAlmaguer @Prospects1500 @Prospects365 pic.twitter.com/aJCJGRyifz

— Michael Caplan (@M_Caplan) August 14, 2021