What does it take to keep going when you're overlooked, rejected, or building a business through uncertainty? In this episode of Designing Successful Startups, Jothy Rosenberg talks with former NFL linebacker and entrepreneur Shawn Loiseau about mental toughness, work ethic, entrepreneurship, resilience, sales, and building businesses from the ground up. Shawn went from receiving zero Division 1 football offers to becoming the number one tackling linebacker in Division 2 and earning his way into the NFL with the Houston Texans and Indianapolis Colts. After football, he took the same work ethic into entrepreneurship, building a successful nutrition business, launching a home gym equipment business during COVID, investing in real estate, and eventually becoming the number one Sunrun solar sales rep in the country. His biggest lesson? Pain tolerance may be one of an entrepreneur's greatest competitive advantages. Shawn explains why successful entrepreneurs need to become comfortable with discomfort, why being overlooked can become fuel, how he turned his personal story into a marketing advantage, and why confronting problems head-on is better than avoiding them. He also shares why chasing money is the wrong goal, why customer experience became one of his most powerful marketing strategies, and how doing the little things right consistently can completely change the direction of your life and business. What You'll Learn • How to develop mental toughness as an entrepreneur • Why pain tolerance matters in business • How Shawn went from no D1 offers to the NFL • How to turn rejection and being overlooked into motivation • Why your personal story can become your best marketing asset • How Shawn built multiple businesses after leaving professional football • Why customer experience can outperform traditional advertising • How to identify opportunities when markets suddenly change • Why successful entrepreneurs confront problems instead of avoiding them • Why purpose and relationships matter more than chasing money ⏱️ Key Moments 00:00 Why chasing money leads you in the wrong direction 00:23 From overlooked small-town athlete to the NFL 02:10 No Division 1 offers and $90,000 in student loans 04:29 The physical reality of playing linebacker in the NFL 08:28 Why pain tolerance is an entrepreneur's real edge 11:54 Building a $400K to $700K nutrition business 12:50 How giving away T-shirts became a marketing strategy 13:45 Turning COVID disruption into a new business opportunity 16:28 Building a $1M home gym equipment business 17:30 Moving into real estate and solar 22:46 Treating sales like your own startup 31:37 Where Shawn's extraordinary work ethic comes from 36:14 Turning being overlooked into fuel 38:31 Why money does not create happiness 40:20 Why entrepreneurs should run toward problems 42:00 Jothy's Startup Toolkit Takeaways Jothy's Startup Toolkit Takeaways 1. Pain tolerance is your real edge. Entrepreneurship requires being able to sit with discomfort longer than most people are willing to. 2. Your story is your marketing. Shawn turned being overlooked into part of what made people remember and trust him. 3. Run toward the storm. Problems rarely disappear when you avoid them. Great founders confront them and get through them faster. Start here: https://whosaysyoucantstartup.teachable.com/p/full-bundle Books by Jothy Rosenberg Tech Startup Toolkit: https://www.manning.com/books/tech-startup-toolkit Follow Jothy LinkedIn: https://www.linkedin.com/in/jothy Website: https://www.jothyrosenberg.com Newsletter: https://www.linkedin.com/build-relation/newsletter-follow?entityUrn=7266943963645853696 Spotify: https://open.spotify.com/show/4AcONvI1yssfvybLEziXa4 #Entrepreneurship #MentalToughness #BusinessSuccess #StartupFounder #EntrepreneurMindset