Brian DeLunas, current Mariners bullpen coach and the team's former director of pitching development and strategies, joins Shannon Drayer and Boy Howdy for an in-depth discussion about how teams develop pitching now as well as specifics on M's pitchers like Marco Gonzales, Justus Sheffield and Logan Gilbert. *Note* This is an audio-only version of a video interview. Watch Part 1 here, and part 2 here.