| Player | Pos | Seasons | Born | Birthplace | |
| Dave Hajek | 3B/2B | 1995-96 | Oct 14, 1967 | Roseville | CA |
| John Halama | P | 1998 | Feb 22, 1972 | Brooklyn | NY |
| Bill Hall | 2B | 2011 | Dec 28, 1979 | Tupelo | MS |
| Mike Hampton | P | 1994-99, 2009 | Sep 9, 1972 | Brooksville | FL |
| J.A. Happ | P | 2010-12 | Oct 19, 1982 | Peru | IL |
| Carroll Hardy | OF | 1963-64 | May 18, 1933 | Sturgis | SD |
| Larry Hardy | P | 1976 | Jan 10, 1948 | Goose Creek | TX |
| Pete Harnisch | P | 1991-94 | Sep 23, 1966 | Commack | NY |
| Lucas Harrell | P | 2011-14 | Jun 3, 1985 | Springfield | MO |
| Buddy Harris | P | 1970-71 | Dec 5, 1948 | Philadelphia | PA |
| Candy Harris | PH | 1967 | Sep 17, 1947 | Selma | AL |
| Reggie Harris | P | 1998 | Aug 12, 1968 | Waynesboro | VA |
| Will Harris | P | 2015-19 | Aug 28, 1984 | Houston | TX |
| Chuck Harrison | 1B | 1965-67 | Apr 25, 1941 | Abilene | TX |
| Dean Hartgraves | P | 1995-96 | Aug 12, 1966 | Bakersfield | CA |
| J C Hartman | SS | 1962-63 | Apr 15, 1934 | Cottonton | AL |
| Ryan Hartman | P | 2021 | Apr 21, 1994 | Anaheim | CA |
| Chad Harville | P | 2004-05 | Sep 16, 1976 | Selmer | TN |
| Billy Hatcher | OF | 1986-89 | Oct 4, 1960 | Williams | AZ |
| LaTroy Hawkins | P | 2008-09 | Dec 21, 1972 | Gary | IN |
| Charlie Hayes | 3B/DH | 2001 | May 29, 1965 | Hattiesburg | MS |
| Bill Heath | C | 1966-67 | Mar 10, 1939 | Yuba City | CA |
| Jeff Heathcock | P | 1983, 1985, 1987-88 | Nov 18, 1959 | Covina | CA |
| Danny Heep | 1B/OF | 1979-82 | Jul 3, 1957 | San Antonio | TX |
| Al Heist | OF | 1962 | Oct 5, 1927 | Brooklyn | NY |
| Tommy Helms | 2B | 1972-75 | May 5, 1941 | Charlotte | NC |
| Steve Henderson | OF | 1988 | Nov 18, 1952 | Houston | TX |
| Mike Henneman | P | 1995 | Dec 11, 1961 | St. Charles | MO |
| Randy Hennis | P | 1990 | Dec 16, 1965 | Clearlake | CA |
| Óscar Henriquez | P | 1997 | Jan 28, 1974 | La Guaira | VZ |
| Bill Henry | P | 1969 | Oct 15, 1927 | Alice | TX |
| Butch Henry | P | 1992 | Oct 7, 1968 | El Paso | TX |
| Doug Henry | P | 1998-2000 | Dec 10, 1963 | Sacramento | CA |
| Dwayne Henry | P | 1991 | Feb 16, 1962 | Elkton | MD |
| Anderson Hernández | 2B/SS | 2010 | Oct 30, 1982 | Santo Domingo | DR |
| Carlos Hernández | 2B/SS | 1999 | Dec 12, 1975 | Caracas | VZ |
| Carlos Hernández | P | 2001-02, 2004 | Apr 22, 1980 | Guacara | VZ |
| Enrique Hernández | OF/SS | 2014 | Aug 24, 1991 | San Juan | PR |
| Manny Hernández | P | 1986-87 | May 7, 1961 | La Romana | DR |
| Roberto Hernández | P | 2015 | Aug 30, 1980 | Santo Domingo | DR |
| Runelvys Hernández | P | 2008 | Apr 27, 1978 | Santo Domingo | DR |
| Teoscar Hernández | OF | 2016-17 | Oct 15, 1992 | Cotui | DR |
| Xavier Hernandez | P | 1990-93, 1996 | Aug 16, 1965 | Port Arthur | TX |
| José Herrera | OF/2B | 1967-68 | Apr 8, 1942 | San Lorenzo | VZ |
| Ed Herrmann | C | 1976-78 | Aug 27, 1946 | San Diego | CA |
| Steve Hertz | 3B | 1964 | Feb 26, 1945 | Wright Patterson AFB | OH |
| Jack Hiatt | C | 1971-72 | Jul 27, 1942 | Bakersfield | CA |
| Richard Hidalgo | OF | 1997-2004 | Jun 28, 1975 | Caracas | VZ |
| Jason Hirsh | P | 2006 | Feb 20, 1982 | Santa Monica | CA |
| Joe Hoerner | P | 1963-64 | Nov 12, 1936 | Dubuque | IA |
| L.J. Hoes | OF | 2013-15 | Mar 5, 1990 | Washington | DC |
| John Hoffman | C | 1964-65 | Oct 31, 1943 | Aberdeen | SD |
| Chris Holt | P | 1996-97, 1999-2000 | Sep 18, 1971 | Dallas | TX |
| J.R. House | C/1B | 2006, 2008 | Nov 11, 1979 | Charleston | WV |
| Pat House | P | 1967-68 | Sep 1, 1940 | Boise | ID |
| Paul Householder | OF | 1987 | Sep 4, 1958 | Columbus | OH |
| Larry Howard | C | 1970-73 | Jun 6, 1945 | Columbus | OH |
| Thomas Howard | OF | 1997 | Dec 11, 1964 | Middletown | OH |
| Wilbur Howard | OF | 1974-78 | Jan 8, 1949 | Lowell | NC |
| Art Howe | 2B/3B/1B | 1976-82 | Dec 15, 1946 | Pittsburgh | PA |
| Jack Howell | 1B/3B/DH | 1998-99 | Aug 18, 1961 | Tucson | AZ |
| James Hoyt | P | 2016-18 | Sep 30, 1986 | Boise | ID |
| John Hudek | P | 1994-97 | Aug 8, 1966 | Tampa | FL |
| Aubrey Huff | OF/3B | 2006 | Dec 20, 1976 | Marion | OH |
| Philip Humber | P | 2013 | Dec 21, 1982 | Nacogdoches | TX |
| Brian Hunter | OF | 1994-96, 2002-03 | Mar 5, 1971 | Portland | OR |