Jack Gerard Taschner (born April 21, 1978) is a former left-handed Major League Baseball relief pitcher.

He played for the San Francisco Giants, Philadelphia Phillies, Pittsburgh Pirates, and Los Angeles Dodgers.

[1] After graduating, he chose not to sign and went on to the University of Wisconsin–Oshkosh, where he posted a 7–0 record in nine games (eight starts) and a 1.53 earned run average (ERA) during the 1999 season.

He returned to San Jose in 2001, where he pitched 2+1⁄2 months, making the California league all-star team.

[4] The road to recovery was not easy for Taschner, as his record with the Norwich Navigators in 2003 was 0–6;[3] he posted an ERA of 5.68, the highest of his minor league career to date, striking out only 46 batters and allowing 48 earned runs.

Taschner remained at Fresno to begin the 2005 season, but he began to work exclusively as a relief pitcher and regained the form of his early career, posting a 3–0 record and a 1.64 ERA before being called up to the major leagues for the first time.

[1] He spent more time with the Giants throughout the season as well, making 24 appearances and posting no wins with an 8.38 ERA in the major leagues.

Taschner's 2008 season yielded a strong performance, in which he allowed only 26 earned runs in 48 innings; he struck out 39 batters while walking 24.

[10] On December 23, 2009, Taschner signed a minor league contract with the Pittsburgh Pirates with an invitation to spring training.

On June 27, 2010, he signed a minor league contract with the Los Angeles Dodgers and was assigned to the AAA Albuquerque Isotopes.