#3. CM Punk never won the United States Championship
CM Punk has won every title available on the WWE main roster during his time there except for the United States Championship. Surprisingly, Punk never had a United States Championship match throughout his long WWE career.
The Best in the World spent most of his first two years on the WWE roster competing on ECW. During that time, the United States Championship was defended on SmackDown and was held by several superstars including Bobby Lashley, MVP and Matt Hardy.
Meet John Cena's dad HERE
In mid-2008, Punk moved to Monday Night RAW and was later drafted to SmackDown in April 2009. The same draft sent the then-United States Champion MVP to RAW, which kept the title out of CM Punk's reach.
The former WWE World Heavyweight Champion did not return to RAW until October 2010. Despite finally having the United States Championship on the same brand, Punk was occupied with other goals. The 42-year-old led The New Nexus faction before later chasing the WWE Championship.
The United States Championship remains the only title that CM Punk never won during his time in WWE. Not winning the title prevented the former WWE Superstar from becoming a Grand Slam Champion.