Carl may refer to:

Karl Muggeridge born 20 April 1974 in Tweed Heads, New South Wales, Australia is a professional motorcycle racer. He is married to Isobel, and has one son, Ryan Luca. He won the Supersport World Championship in 2004, and has raced in Superbike World Championship ever since, primarily on Hondas.

After several years of Motocross, Muggas began circuit racing in 1994, finishing 4th in his homeland's 250cc series a year later on a Suzuki. Over the next 3 years he did an assortment of races around the world, primarily on 600cc Supersport bikes. He was a regular in his home series in 1996, and in the British championship for the next 2 years, coming 4th overall in 1999, before moving on to the Supersport World Championship.

He was 5th overall in 2000, 7th in 2001, 14th in 2002 and 4th in 2003, before taking the 2004 crown as the lead rider for Ten Kate Honda, with 7 wins and 8 poles.

Ten Kate expanded its Superbike World Championship team to 2 Honda Fireblade bikes for 2005, and Karl was moved up to join Chris Vermeulen, who won the WSS title for Ten Kate in 2003 and challenged for the WSBK crown as a series rookie in 2004. 2005 proved to be a tough year for Karl He finished the season 11th overall with 124 points.

Massimiliano "Max" Biaggi (Italian pronunciation: [ˈmaks ˈbjaddʒi]; born June 26, 1971 in Rome, Italy) is an Italian motorcycle racer and winner of the 2010 World Superbike Championship. Throughout this racing career, he has won the 250cc World Championship four times, and finished as runner-up in both the 500cc and MotoGP championships. In 2007 he switched to the World Superbike Championship, finishing third overall as a rookie and earned his first Superbike World Championship in 2010 becoming only the 2nd European from outside of the United Kingdom after Raymond Roche to do so.

He has been nicknamed 'il Corsaro' ('the Corsair') and 'the Roman Emperor'.

Biaggi was more interested in football as a child. But in 1989, after he was given a motorcycle for his seventeenth birthday, he began his racing career in the 125cc class at age eighteen. In 1990 he won the Italian Sport Production Championship. Following his success in 125cc, Biaggi moved up to the 250cc class.

In 1991, Biaggi finished second behind British rider Woolsey Coulter in the European 250cc championship on an Aprilia RS250, and that same year he finished twenty-seventh in the Grand Prix motorcycle 250cc world championship riding for the same manufacturer. In 1992, Biaggi completed his first entire season in 250cc Grand Prix for Aprilia, and finished the season fifth overall. In that same season he took his first victory in Kyalami, South Africa. The following season, Biaggi joined Honda, and finished fourth in the championship standings, including a single victory in Barcelona. In 1994 he returned to Aprilia and dominated the 250cc Grand Prix championship by winning three consecutive titles in 1994, 1995 and 1996. In 1997, Biaggi again returned to Honda, riding for Erv Kanemoto's team, and won his fourth consecutive title. Following that, he moved up to the 500cc class.

Sam Bird (born 9 January 1987 in Roehampton) is a British racing driver; he was educated at Millfield School in Somerset.

Bird made his name in single seater racing in the Formula BMW category, coming fourteenth overall in his debut season and second in the rookie cup. He came runner up in 2005, which was only his second season in the category and also came fourth in the Formula BMW world final, the race itself was won by German Marco Holzer.

For 2006, Bird entered the British Formula Renault series, where he won four races and came fourth in the championship, 111 points behind series champion Sebastian Hohenthal.

In 2007, Bird raced in the British Formula Three Championship with Carlin Motorsport, racing in a Mercedes powered Dallara. In March 2007, Bird secured sponsorship from BP, "The brand is already prominent in the World Rally Championship" Mark Reader, BP's UK Fuels Marketing Manager, commented, "Sam’s an incredible prospect and we’re excited to be getting into a relationship at this stage of his career" he added. Bird was elected to the Motor Sports Association Race Elite Scheme in April 2007, along with 5 other drivers in various British series and also participated in a series of aerodynamic tests with the AT&T Williams F1 Team.