He is most noted for having had the largest cap size (8 1/4) in the majors when he was an active player, a feature that earned him the nickname Shrek.

Following high school, Mench attended the University of Delaware where he led the Blue Hens to the NCAA tournament in 1998 and 1999.

[4] After an injury-plagued 2003, Mench responded in 2004 by setting career bests in batting average (.279), home runs (26), RBI (71) and slugging percentage (.539).

[5] On April 26, 2006, Mench became the 19th player in major league history to hit a home run in at least six straight games.

[9] The current record for most consecutive games with a home run is eight, held by Dale Long, Don Mattingly, and Ken Griffey Jr. On July 26, 2006, Mench hit a two-run double against the New York Yankees, the 50,000th hit in Rangers franchise history; two days later, he was traded to the Milwaukee Brewers along with Francisco Cordero, Laynce Nix, and Julian Cordero, for Carlos Lee and Nelson Cruz.

[15] On August 25, 2008, Mench was optioned to Triple-A Syracuse by the Blue Jays,[16] but was recalled in early September.

[17] On December 24, 2008, Mench signed a one-year deal to with the Hanshin Tigers of Japan's Nippon Professional Baseball.