Thomas Stephen Gorzelanny (born July 12, 1982) is an American former professional baseball pitcher who is currently the pitching coach for the minor league Amarillo Sod Poodles.

He played in Major League Baseball (MLB) for the Pittsburgh Pirates, Chicago Cubs, Washington Nationals, Milwaukee Brewers, Detroit Tigers and Cleveland Indians.

He made his Major League debut with the Pirates in September, starting against the Houston Astros and pitching 4+1⁄3 innings, receiving the loss.

Gorzelanny was selected to play for the US team in the 2006 All-Star Futures Game, but was ineligible due to being called up by the Pirates.

On June 29, 2006, the Pirates called Gorzelanny up to replace Oliver Pérez in the starting rotation.

He was one of five players in the National League that would be chosen from a final fan vote for the last spot on the NL roster for the 2007 MLB All-Star Game.

[4] After a difficult start to the first half of the season, Gorzelanny was optioned to Triple-A Indianapolis in July.

He was recalled to Pittsburgh several weeks later after a successful tenure in Indianapolis, but ultimately failed to regain his 2007 form.

In late May, he was moved to the bullpen to accommodate the return of Carlos Zambrano to the Cubs rotation.

[4] On January 17, 2011, the Washington Nationals acquired Gorzelanny from the Cubs for prospects Michael Burgess, A. J. Morris, and Graham Hicks.

Gorzelanny became expendable to the Cubs after they traded for Matt Garza ten days earlier.

[21] On July 24, 2016, the Baltimore Orioles signed Gorzelanny to a minor league contract.

[23] On January 28, 2019, Gorzelanny was named pitching coach of the University of Iowa Hawkeyes baseball team [24] and remained there until 2022.

In 2024, he was named as pitching coach for the Amarillo Sod Poodles the Double-A affiliate of the Arizona Diamondbacks.