Troy Edward Glaus (pronounced /ˈɡlɔːs/) (born August 3, 1976 in Tarzana, California) is a Major League Baseball player who plays third base for the St. Louis Cardinals. Previously, Glaus played with the Anaheim Angels (1998-2004), Arizona Diamondbacks (2005), and the Toronto Blue Jays (2006-2007). Glaus lettered in baseball while attending UCLA. He bats and throws right-handed.

Through 10-plus seasons, Glaus has hit .256 with 307 home runs and 877 RBI in 1395 games. In 19 postseason games, he hit .347 with nine home runs and 16 RBI. Glaus has been selected to four All-Star Games.

Glaus began his career with the Angels in 1998 and was installed as the team's starting third baseman in 1999.