Catchers also are prone to knee ailments stemming from the awkward crouching stance they assume. Because of this, catchers have a reputation of being slow baserunners (perhaps the most notable of whom is Ernie Lombardi); even if they have speed at the beginning of their careers, the eventual toll taken on their knees slows them down, although there are some exceptions, such as Manny Sanguillén and Alex Avila. Some players who begin their career as catchers are moved to other positions in order to preserve their running speed, increase their availability for games (mainly catchers with either poor defensive skills or recurring injuries), and take advantage of their prowess with the bat. Prominent examples of catchers switching position in mid-career include Mike Napoli, Craig Biggio, B. J. Surhoff, Joe Mauer, Brandon Inge, and Dale Murphy (although Murphy was also known as a poor thrower to the pitcher and to second base, nearly hitting pitchers in the process).