| Frank Beck | |
| Position: | Pitcher/Outfielder |
| Bats: | Unknown |
| Throws: | Right |
| Birth Date: | April 29, 1860 |
| Birth Place: | Poughkeepsie, New York, U.S. |
| Death Place: | Detroit, Michigan, U.S. |
| Debutleague: | MLB |
| Debutdate: | May 2 |
| Debutyear: | 1884 |
| Debutteam: | Pittsburgh Alleghenys |
| Finalleague: | MLB |
| Finaldate: | September 18 |
| Finalyear: | 1884 |
| Finalteam: | Baltimore Monumentals |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–5 |
| Stat3label: | Strikeouts |
| Stat3value: | 18 |
| Stat2label: | Earned run average |
| Stat2value: | 6.62 |
| Teams: |
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Frank J. Beck [born Frank J. Hengstebeck] (April 29, 1860 – February 8, 1941) was an American right-handed starting pitcher and right fielder in Major League Baseball who played for the Pittsburgh Alleghenys (American Association) and Baltimore Monumentals (Union Association) during the season.
In his one-season career, Beck posted a 0–5 record with a 6.62 ERA in five pitching appearances (four complete games), giving up 42 runs (17 unearned) on 50 hits and 10 walks while striking out 18 in 34.0 innings of work. He also played four games at right field. As a hitter, he went 6-for-32 for a .188 average, including two doubles and two runs scored.