Frederick Charles "Fireball" Wenz (August 26, 1941 – October 6, 2020) was a middle relief pitcher in Major League Baseball who played from 1968 through 1970 for the Boston Red Sox (1968–69) and Philadelphia Phillies (1970).

Wenz was signed as an amateur free agent by the San Francisco Giants out of Somerville High School in 1959.

He earned his nickname as a minor leaguer when he struck out more than one batter per inning during his time in the Red Sox' farm system.

In 31 relief appearances, Wenz posted a 3–0 record with a 4.68 ERA and one save, giving up 22 runs (one unearned) on 36 hits and 25 walks while striking out 38 in 421⁄3 innings of work.

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