Write an article that provides a detailed overview of the Kansas City Chiefs’ first day at training camp for the 2025 season, highlighting key performances, particularly the impact of rookie Josh Simmons as he steps into the left tackle position. Discuss the team’s focus on rejuvenating their downfield passing game and how quarterback Patrick Mahomes’ leadership shapes the squad’s dynamics. Incorporate insights on the importance of physical conditioning and injury prevention in Simmons’ progression from recovery to competition readiness. Reflect on the team’s strategic depth and how it positions them for future challenges. Conclude with a forward-looking statement about the potential developments throughout the training camp and the upcoming season.