| Ron Mrozinski | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Left |
| Birth Date: | September 16, 1930 |
| Birth Place: | White Haven, Pennsylvania, U.S. |
| Death Place: | Washington, New Jersey, U.S. |
| Debutleague: | MLB |
| Debutdate: | June 20 |
| Debutyear: | 1954 |
| Debutteam: | Philadelphia Phillies |
| Finalleague: | MLB |
| Finaldate: | September 9 |
| Finalyear: | 1955 |
| Finalteam: | Philadelphia Phillies |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 1–3 |
| Stat3label: | Strikeouts |
| Stat3value: | 44 |
| Stat2label: | Earned run average |
| Stat2value: | 5.36 |
| Teams: | |
Ronald Frank Mrozinski (September 16, 1930 – October 19, 2005) was an American professional baseball player, a pitcher who played in 37 Major League Baseball games over two seasons, and, for the Philadelphia Phillies. His professional career spanned fourteen years, from until . Born in White Haven, Pennsylvania, he threw left-handed, batted right-handed, and was listed as 5feet tall and .
Mrozinski came up through the Phillies' organization, registering double figures in wins during each of his first four pro seasons. Recalled from Triple-A Syracuse in the middle of, he got into 15 games for the Phils, four as a starter, and split two decisions with a 4.50 earned run average in 48 innings pitched. He threw one complete game; ironically, it was the game he lost, 5–2, on September 14 against the St. Louis Cardinals at Connie Mack Stadium.[1] Mrozinski had held the Cards to two runs into the eighth inning before giving up back-to-back home runs to Red Schoendienst (a two-run job) and Rip Repulski.[1] Ten days later, Mrozinski earned his only big-league win, going 6 innings against the eventual world champion New York Giants. In that game, Mrozinski left with a 4–2 lead, and was relieved by a Baseball Hall of Famer, Robin Roberts, who shut down the Giants for the remainder of the game to earn a save.[2]
In, he appeared in 22 games for Philadelphia, making only one start, and was winless in two decisions. He did, however, earn his only MLB save that year when he preserved a 10–8 victory over the Cardinals on June 21. The 1955 campaign was Mrozinski's only full year and his last season on a big-league roster. In his 37 games and 82 innings pitched, he allowed 87 hits and 44 bases on balls; he also struck out 44. Returning to the minors in 1957, he racked up four more years with double-digit victories, and won 119 games overall before retiring from the game.
Ron Mrozinski died at his home in Washington, New Jersey.[3]