Baseball Roster for 1978 Seattle Mariners
| # | Player Name | Pos | Age | B | T | Ht | Wt | Born | Place | High Level | mlbYears | Salary |
| 17 | Glenn Abbott | P | 27 | R | R | 6-6 | 200 | 2/16/1951 | Little Rock,Arkansas | MLB | 1973-1984 |
| 14 | Jose Baez | 2B | 24 | R | R | 5-8 | 160 | 12/31/1953 | San Cristobal,Dominican Republic | MLB | 1977-1978 |
| 11 | Charlie Beamon | 1B | 24 | L | L | 6-1 | 183 | 12/4/1953 | Oakland,California | MLB | 1978-1981 |
| 26 | Juan Bernhardt | 3B-1B | 24 | R | R | 5-11 | 160 | 8/31/1953 | San Pedro de Macoris,Dominican Republic | MLB | 1976-1979 |
| 23 | Bruce Bochte | 1B-OF | 27 | L | L | 6-3 | 200 | 11/12/1950 | Pasadena,California | MLB | 1974-1986 |
| 4 | Steve Braun | OF-3B | 30 | L | R | 5-10 | 180 | 5/8/1948 | Trenton,New Jersey | MLB | 1971-1985 |
| 42 | Tom Brown | P | 28 | R | R | 6-1 | 170 | 8/10/1949 | Lafayette,Louisiana | MLB | 1978-1978 |
| 39 | Steve Burke | P | 23 | B | R | 6-2 | 200 | 3/5/1955 | Stockton,California | MLB | 1977-1978 |
| 48 | Jim Colborn | P | 32 | R | R | 6-0 | 191 | 5/22/1946 | Fayetteville,North Carolina | MLB | 1969-1978 |
| 2 | Julio Cruz | 2B | 23 | B | R | 5-9 | 165 | 12/2/1954 | Brooklyn,New York | MLB | 1977-1986 |
| 44 | John Hale | OF | 24 | L | R | 6-2 | 195 | 8/5/1953 | Fresno,California | MLB | 1974-1979 |
| 40 | Rick Honeycutt | P | 24 | L | L | 6-1 | 190 | 6/29/1954 | Chattanooga,Tennessee | MLB | 1977-1997 |
| 29 | Tom House | P | 31 | L | L | 5-11 | 190 | 4/29/1947 | Seattle,Washington | MLB | 1971-1978 |
| 46 | Rick Jones | P | 23 | L | L | 6-5 | 190 | 4/16/1955 | Jacksonville,Florida | MLB | 1976-1978 |
| 9 | Ruppert Jones | OF | 23 | L | L | 5-10 | 170 | 3/12/1955 | Dallas,Texas | MLB | 1976-1987 |
| 30 | Byron McLaughlin | P | 22 | R | R | 6-1 | 185 | 9/29/1955 | Van Nuys,California | MLB | 1977-1983 |
| 7 | Dan Meyer | 1B-OF | 25 | L | R | 5-11 | 180 | 8/3/1952 | Hamilton,Ohio | MLB | 1974-1985 |
| 10 | Larry Milbourne | 2B-SS | 27 | B | R | 6-0 | 165 | 2/14/1951 | Port Norris,New Jersey | MLB | 1974-1984 |
| 34 | Paul Mitchell | P | 27 | R | R | 6-1 | 195 | 8/19/1950 | Redmond,Washington | MLB | 1975-1980 |
| 25 | John Montague | P | 30 | R | R | 6-2 | 213 | 9/12/1947 | Newport News,Virginia | MLB | 1973-1980 |
| 14 | Tom Paciorek | OF-1B | 31 | R | R | 6-4 | 215 | 11/2/1946 | Detroit,Michigan | MLB | 1970-1987 |
| 20 | Mike Parrott | P | 23 | R | R | 6-4 | 210 | 12/6/1954 | Oxnard,California | MLB | 1977-1981 |
| 18 | Kevin Pasley | C | 24 | R | R | 6-0 | 185 | 7/22/1953 | Bronx,New York | MLB | 1976-1978 |
| 3 | Bill Plummer | C | 31 | R | R | 6-1 | 200 | 3/21/1947 | Oakland,California | MLB | 1968-1978 |
| 13,45 | Dick Pole | P | 27 | R | R | 6-3 | 210 | 10/13/1950 | Trout Creek,Michigan | MLB | 1973-1978 |
| 41 | Shane Rawley | P | 23 | R | L | 6-0 | 185 | 6/27/1955 | Racine,Wisconsin | MLB | 1978-1989 |
| 12 | Craig Reynolds | SS | 25 | L | R | 6-1 | 175 | 12/27/1952 | Houston,Texas | MLB | 1975-1989 |
| 8 | Leon Roberts | OF | 27 | R | R | 6-3 | 200 | 1/22/1951 | Vicksburg,Michigan | MLB | 1974-1984 |
| 6 | Bob Robertson | 1B | 31 | R | R | 6-1 | 210 | 10/2/1946 | Frostburg,Maryland | MLB | 1967-1979 |
| 43 | Enrique Romo | P | 30 | R | R | 5-11 | 185 | 7/15/1947 | Santa Rosalia,Mexico | MLB | 1977-1982 |
| 36 | Leroy Stanton | OF | 32 | R | R | 6-1 | 195 | 4/10/1946 | Latta,South Carolina | MLB | 1970-1978 |
| 1 | Bill Stein | 3B-2B | 31 | R | R | 5-10 | 170 | 1/21/1947 | Battle Creek,Michigan | MLB | 1972-1985 |
| 15 | Bob Stinson | C | 32 | B | R | 5-11 | 185 | 10/11/1945 | Elkin,North Carolina | MLB | 1969-1980 |
| 27 | Jim Todd | P | 30 | L | R | 6-2 | 190 | 9/21/1947 | Lancaster,Pennsylvania | MLB | 1974-1979 |
Team Personnel
