Extract why Tim Lincecum was called "The Freak"

Context: Timothy Leroy Lincecum, nicknamed "The Freak", "The Franchise", "The Freaky Franchise" and "Big Time Timmy Jim", is an American former professional baseball pitcher. Nicknamed "The Freak" for his ability to generate powerful pitches despite his slight physique, the power pitcher led the National League in strikeouts for three consecutive years in a span from 2008 to 2010. He also led the league in shutouts in 2009 and won the Babe Ruth Award in 2010 as the most valuable player of the MLB postseason. Lincecum won consecutive Cy Young Awards in 2008 and 2009, becoming the first MLB pitcher to win the award in his first two full seasons. He also appeared in four consecutive All-Star Games from 2008 through 2011 and pitched no-hitters in 2013 and 2014.

Answer: Tim Lincecum was called "The Freak" for his ability to generate powerful pitches despite his slight physique (5 feet 11 inches, 170 pounds).