Matthew Thomas Cain (born October 1, 1984), nicknamed The Horse, Big Daddy, and Big Sugar, is an American former professional baseball pitcher, who played 13 seasons in Major League Baseball (MLB) for the San Francisco Giants. A three-time World Series champion, he is widely regarded as a central figure of the Giants' success in the 2010s for his pitching and leadership. During his playing days, Cain stood 6 feet 3 inches (1.91 m) tall, weighing 230 pounds (100 kg).
The Giants drafted Cain out of high school in 2002, and he made his MLB debut at age 20 in 2005, becoming the youngest player in the National League (NL) that year.
In 2009, Cain was named to his first career All-Star Game and won the Willie Mac Award. During the 2010 MLB Postseason, he did not allow an earned run in any of the three playoff games he pitched in as the Giants won their first World Series since 1954. In 2011, Cain won 12 games and had a 2.88 earned run average (ERA). In 2012, he signed a five-year, $112.5 million contract extension, which was at the time the largest deal for a right-handed pitcher in North American sports history.