Podcasts · The Marathon Podcast
#229 Supadupaslim (Michael Morris): The Slowest Kid on the Team Became a 2:15 Marathoner
· 1 h 29 min · S1 E229
Episode #229 Supadupaslim (Michael Morris): The Slowest Kid on the Team Became a 2:15 Marathoner
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Michael, better known as SupaDupa Slim, is a 2:15 marathoner from Austin, Texas, coached by Jeff Cunningham of Bat City Track Lab. His path to 2:15 has been anything but linear: from the slow kid on the team in a small Texas town, to a marathon that fell apart in the second half, to missing the Olympic Trials standard by seconds, and finally to running 2:15 at the McCurdy Pro Marathon and qualifying.
In this conversation, Michael breaks down what actually moved the needle: small, steady jumps instead of big leaps, a smarter approach to mileage, learning to run marathon pace without fear, and why time alone should never define you as a runner. He walks through his training week for the marathon, the block behind the 2:15, and the race itself. He also explains where the SupaDupa Slim name comes from.
Before the interview, Kristian shares his own training update on the road to a sub-2:30 attempt in Valencia, including a 3:21 per kilometer opener in a session he did not expect to hold.
In this episode:
• Where the name SupaDupa Slim comes from • From slow kid to 2:15 marathoner, 25 years of running • Two first marathons and what they taught him • Overtraining, injury and rebuilding with patience • Why small jumps and consistency beat big leaps • How to chase a faster pace without freezing up • A full marathon training week and the block behind the 2:15 • His mileage philosophy and advice for runners • The McCurdy Pro Marathon, mile by mile • Next up: the Houston Half Marathon and a Boston pro field hope
Timestamps 00:00 Introducing Michael 01:44 Kristian’s training update 02:08 Saysky 14:45 Interview begins 14:52 The name SupaDupa Slim 16:52 What running means to Michael 20:03 Staying consistent for 25 years 22:32 Growing up with running siblings 26:40 His first marathons 32:43 Learning what it takes 39:01 Injury and rebuilding 41:00 Time goals and the ceilings we create 44:53 Learning to run faster paces 48:17 Commitment and decision making 51:07 Coach Jeff Cunningham 53:32 A marathon block for 2:15 1:00:12 Recovery and fueling 1:03:49 Small habits and mobility 1:06:23 Mileage advice 1:10:23 Doing less and feeling better 1:13:24 A week of marathon training 1:17:45 The McCurdy Pro Marathon 1:23:06 Qualifying, emotions and the finish 1:26:11 What’s next 1:27:34 Wrap up
Michael on Instagram: @supadupaslim
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Full episodes + the Boston 2025 documentary: https://www.youtube.com/@Warwickruns Follow my training journey on Instagram: @warwick.runs Music from Musicbed: MB01XPYH8ZYENVAMB0133EV2TCQFZY
Links in the notes 3
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