As a four-year-old, Joe Mauer hit the ball so hard he was asked to leave his T-ball league, and in four years of high school he struck out only once. This deep dive explores the physics and psychology of extreme patience that made a hometown St. Paul kid a generational talent.

A two-sport national player of the year, Mauer built a historic career as a catcher before a concussion forced him to reinvent his athletic identity to protect his mind.

• Was drafted first overall by the Twins in 2001 over pitcher Mark Prior, choosing baseball over Florida State football.
• Became the first American League catcher to win a batting title, doing so three times.
• In 2009 led the majors in average, on-base, and slugging percentage and won the MVP award.
• Moved to first base after a 2013 concussion, prioritizing long-term brai ...