Thomas Samuel Manzella, Jr. (born April 16, 1983, in Chalmette, Louisiana) is a former professional baseball shortstop. He played in Major League Baseball (MLB) for the Houston Astros.

Manzella attended Tulane University and played for the Tulane Green Wave baseball team. He earned All-Tournament honors at the 2002 Conference USA Tournament after hitting .615 (8-for-13) with a double and five RBIs during the tournament. In 2003, he started all 59 games at second base and received honorable-mention All-Louisiana honors after tying for the team lead in doubles (20) while ranking tied for second in RBIs (44). Tommy was again named to the C-USA All-Tournament Team after hitting .615 (8-for-13) with an RBI, a walk, and a stolen base. In 2004, he was the only player on the team to start at the same position in all 62 games, and earned second-team All-Louisiana honors.

Manzella was drafted by the Astros in the 3rd round of the 2005 Major League Baseball draft, and went on to play in parts of two seasons for the Astros.

(excerpted from Baseball Almanac, BR Bullpen & Wikipedia)