Robert William Howard (born January 29, 1963) is an American professional wrestler, actor, and former auto racer and wrestling trainer/host, better known by the ring name Hardcore Holly or Bob Holly. He is best known for his 16-year career with the World Wrestling Federation/World Wrestling Entertainment (WWF/E) where he also worked under the ring names Thurman "Sparky" Plugg, Bob "Spark Plug" Holly, Bombastic Bob, and "the Big Shot".

After debuting in 1987, Holly worked for World Organization Of Wrestling Smoky Mountain Wrestling and other independent promotions, before joining WWE full-time in 1994. Initially portraying the character of a NASCAR driver, Thurman "Sparky" Plugg, his name was soon changed to Bob "Spark Plug" Holly. In 1998, he formed a team with Bart Gunn, known as The Midnight Express.

In 1999, Howard became known simply as "Hardcore Holly", developing a stern, punishing persona. Once taking up the Hardcore Holly gimmick, he was joined by on-screen cousins, Crash and Molly.

In 2002, Hardcore Holly suffered a broken neck during a match with Brock Lesnar, which sidelined him for over a year. Upon his return, he engaged in a major feud with Lesnar for the WWE Championship and minor feuds with other wrestlers, such as Mr. Kennedy and Rob Van Dam. He later formed a tag team combination with Cody Rhodes in 2007. Holly was released from the WWE in 2009, wrestling only intermittently on the independent circuit. He published his autobiography, The Hardcore Truth: The Bob Holly Story, in 2013.

Championships held by Holly over the course of his career include the WWF/E World Tag Team Championship, NWA World Tag Team Championship, and WWF Hardcore Championship.