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| Name | Team | Age |
| Bob Mairena | Retired (1971, Age 37) | Died (2007, Age 73) |
| Drafted | Position | Bats/Throws |
| Round 1, Pick 5 (1952) |
RP | L/R |
| League | Option Years
|
Majors Service Time |
| Branch Rickey League | 0 | 13 years (111 games) |
| Total Rating
|
Arm | Range |
| Contact vs R | Contact vs L | Speed |
| Power vs R | Power vs L | Bunting |
| Endurance | Velocity | Control |
| Leadership
|
Mentor Value
|
|
| Health
|
Injured Days
|
Birthday |
| 0 | 1/4/1934 | |
| WS Rings | WS Appearances | LCS Appearances |
| 1 | 1 | 4 |
| Alt Pos (---) | Alt Pos (---) | Alt Pos (---) |
| (0.0 %) | (0.0 %) | (0.0 %) |
Stats | Splits | Playoffs | Energy | Improvements | Past Skills | Awards | Batting | Fielding | Game Log
| Year | Type
|
Chances
|
Endurance | Velocity | Control | Total |
| 1952 | Minors | 58.00 | 2 / 2 | 6 / 23 | 8 / 33 | 16 / 58 |
| 1953 | Minors | 63.00 | 4 / 4 | 5 / 25 | 12 / 34 | 21 / 63 |
| 1954 | Minors | 58.00 | 1 / 4 | 7 / 29 | 6 / 25 | 14 / 58 |
| 1955 | Minors | 71.00 | 1 / 2 | 8 / 39 | 4 / 30 | 13 / 71 |
| 1956 | Minors | 32.00 | 0 / 3 | 2 / 16 | 0 / 13 | 2 / 32 |
| 1956 | Majors | 16.24 | 0 / 0 | 2 / 6 | 0 / 10 | 2 / 16 |
| 1957 | Minors | 46.00 | 1 / 3 | 2 / 18 | 4 / 25 | 7 / 46 |
| 1957 | Majors | 6.47 | 0 / 0 | 1 / 4 | 0 / 2 | 1 / 6 |
| 1958 | Majors | 42.69 | 1 / 3 | 4 / 19 | 1 / 20 | 6 / 42 |
| 1959 | Majors | 42.00 | 3 / 7 | 0 / 19 | 4 / 16 | 7 / 42 |
| 1960 | Majors | 40.36 | 2 / 10 | 1 / 11 | 3 / 19 | 6 / 40 |
| 1961 | Majors | 40.77 | 1 / 7 | 2 / 19 | 0 / 14 | 3 / 40 |
| 1962 | Majors | 38.10 | 1 / 6 | 2 / 18 | 0 / 14 | 3 / 38 |
| 1963 | Majors | 40.39 | 2 / 7 | 1 / 14 | 0 / 19 | 3 / 40 |
| 1964 | Majors | 45.57 | 1 / 7 | 0 / 17 | 0 / 21 | 1 / 45 |
| 1965 | Majors | 38.62 | 1 / 7 | 0 / 20 | 0 / 11 | 1 / 38 |
| 1966 | Majors | 36.50 | 0 / 7 | 1 / 17 | 0 / 12 | 1 / 36 |
| 1967 | Majors | 45.78 | 0 / 6 | 0 / 16 | 0 / 23 | 0 / 45 |
| 1968 | Majors | 40.33 | -3 / 6 | -8 / 17 | 0 / 17 | -11 / 40 |
| 1969 | Majors | 40.25 | -1 / 5 | -2 / 20 | -2 / 15 | -5 / 40 |
| 1970 | Majors | 42.74 | -3 / 10 | -5 / 13 | -3 / 19 | -11 / 42 |
| 1971 | Minors | 54.00 | 0 / 2 | 0 / 26 | 0 / 26 | 0 / 54 |
| 1971 | Majors | 1.62 | -1 / 0 | -2 / 1 | -2 / 0 | -5 / 1 |
| Total | 13 / 108 | 27 / 407 | 35 / 418 | 75 / 933 |
| Date | Transaction |
| 1971-11-01 | Bob Mairena has retired from the Baltimore Terrapins |
| 1971-04-09 | The Baltimore Terrapins have designated Bob Mairena for assignment. |
| 1968-07-06 | Trade #1647962 has been completed between the Chicago Cossacks and the Baltimore Terrapins. The Baltimore Terrapins receive Dennis Fitzgerald, Bob Mairena from the Chicago Cossacks in exchange for Draft Pick 1972 Round 1 BAL (Tom Overy), Draft Pick 1971 Round 2 BAL (Kenta Kawai). |
| 1966-07-14 | Bob Mairena of the Chicago Cossacks is injured and is expected to be out 21 days. |
| 1966-04-03 | Bob Mairena of the Chicago Cossacks is injured and is expected to be out 21 days. |
| 1963-09-13 | Bob Mairena of the Chicago Cossacks is injured and is expected to be out 17 days. |
| 1963-07-07 | Bob Mairena of the Chicago Cossacks is injured and is expected to be out 15 days. |
| 1962-09-07 | Bob Mairena of the Chicago Cossacks is injured and is expected to be out 20 days. |
| 1962-05-21 | Trade #1640888 has been completed between the Chicago Cossacks and the Kansas City Prairie Princes. The Kansas City Prairie Princes receive Steve Kelley, Jack Law, Jim Blanks, Bob Cowley from the Chicago Cossacks in exchange for Billy Smith, Bob Mairena, Chad Gagliano, Draft Pick 1964 Round 1 KC (Keith Tobin). |
| 1957-09-16 | The Kansas City Prairie Princes have promoted Bob Mairena to the major league team. |
| 1957-07-02 | Trade #1636254 has been completed between the Chicago Cossacks and the Kansas City Prairie Princes. The Kansas City Prairie Princes receive Chad Gagliano, Bob Mairena, Steve Reams, Draft Pick - 1960 Round 2 (CHN) from the Chicago Cossacks in exchange for Draft Pick 1958 Round 1 KC (Roy Norman), Draft Pick 1962 Round 1 KC (Zenzo Tadano). |
| 1957-04-13 | The Chicago Cossacks have promoted Carl Holman to the major league team. The Chicago Cossacks have sent Bob Mairena to the minors. |
| 1957-04-01 | The Chicago Cossacks have promoted Bob Mairena to the major league team. The Chicago Cossacks have promoted Leon Gardner to the major league team. |
| 1956-06-08 | The Chicago Cossacks have promoted Dennis Fitzgerald to the major league team. The Chicago Cossacks have sent Bob Mairena to the minors. |
| 1956-04-01 | The Chicago Cossacks have promoted Bob Mairena to the major league team. The Chicago Cossacks have waived Joe Ezzell. |
| 1952-04-02 | The Chicago Cossacks have promoted Rick Campbell to the major league team. The Chicago Cossacks have promoted Vance Oertel to the major league team. The Chicago Cossacks have sent Chuck Rizzuto to the minors. The Chicago Cossacks have sent Bob Mairena to the minors. |
| 1952-04-01 | The Chicago Cossacks have auto-promoted Bob Mairena to the major leagues. |
| 1951-04-01 | Trade #1630385 has been completed between the Kansas City Prairie Princes and the Chicago Cossacks. The Chicago Cossacks receive Draft Pick - 1954 Round 1 (KC), Draft Pick 1952 Round 1 KC (Bob Mairena) from the Kansas City Prairie Princes in exchange for Chico Jackson, Gene Porto, Vicente Shannon. |