to warm up Regal from his breakdown after he lost the European Championship to Jeff Hardy. Nowinski feuded with The Dudley Boyz (Bubba Ray Dudley and Spike Dudley) through the summer. Nowinski defeated Tommy Dreamer on the September 9 episode of Raw. A week later, Dreamer attacked Nowinski in a classroom. Their feud ended on the October 14 episode of Raw, where Nowinski was once again successful in defeating Dreamer. Over the next few weeks, Nowinski claimed victories over Jeff Hardy and Booker T before starting a feud with his former Tough Enough trainer, Al Snow. On the November 25 episode of Raw, Nowinski went against Maven in a match that ended in a no contest. Nowinski teamed with D'Lo Brown to defeat Snow and Maven on two occasions. Nowinski continued his feud with Maven into 2003, where Test aligned himself with Maven for a few weeks, successfully defeating Nowinski and Brown on January 13, 2003, episode of Raw. Nowinski competed his first ever Royal Rumble match in 2003, entering at #3. During the match Edge and Rey Mysterio performed a double missile dropkick on Nowinski, but a mistimed execution caused Edge to land on Nowinski's head that caused his subsequent post-concussion syndrome later in his career. On the March 31 episode of Raw, Nowinski was defeated by Scott Steiner. The feud come to an end on the May 12 episode of Raw, where Nowinski teamed with La Résistance (René Duprée and Sylvain Grenier) in a losing effort against Steiner, Test and Goldust. On the May 26 episode of Raw, Nowinski aligned himself with Thuggin' And Buggin' Enterprises, an African American wrestling stable consisting of Rodney Mack, Jazz and their manager Theodore Long. At Insurrextion, Nowinski teamed with Mack and Long in a losing effort against The Dudley Boyz (Bubba Ray Dudley, D-Von Dudley and Spike Dudley). At Bad Blood, Nowinski and Mack defeated Bubba Ray and D-Von. Nowinski wrestled his final match with WWE, due to him sustaining post-concussion syndrome, on the June 23 episode of Raw, in a losing effort against Maven. After a full year of post-concussion symptoms he chose to retire from wrestling. Writing career Following his wrestling career, Nowinski authored Head Games: Football's Concussion Crisis in 2006, which examined the long-term effects of head trauma among athletes, and also became a documentary. The Lancet said "the book sent shockwaves through the National Football League (NFL)"