Gilbert started 2019, his first full season with the Mariners, at low-level A West Virginia for the first month where he started five games with an ERA of 1.59 in 22.2 innings walking only six batters while striking out 36 batters. On May 1, he was promoted to High-A Modesto where he stayed until July 15.
At Modesto, he had a fine time, starting 12 games with an ERA of 1.73 in 60.1 innings, walking 12 and striking out 73. At Arkansas, Logan Gilbert wasn’t as dominated as he was in either West Virginia or Modesto. However, he did better than most pitchers, especially in their first season in professional ball.