Bryan Christopher Augenstein (born July 11, 1986) is an American former professional baseball pitcher who played in Major League Baseball (MLB) for the Arizona Diamondbacks and St. Louis Cardinals.

As a freshman in 2005, he was a member of the Gators team that finished as the runner-up in the College World Series.

Memorably, Augenstein retired twenty-three consecutive batters against the Cincinnati Bearcats in 2006.

The Arizona Diamondbacks selected Augenstein in the seventh round of the 2007 Major League Baseball Draft.

He signed a minor league deal with the Detroit Tigers on March 26, 2014, and he became a free agent after the 2014 season.