June 13, 1975: Gaylord Perry, Indians to Rangers
The notorious spitballer and 1972 AL Cy Young winner was pitching alongside older brother Jim on an Indians team amid a 1-12 skid that would ensure they went nowhere. The Rangers, managed by Billy Martin and with a rotation led by another future Hall of Famer in Ferguson Jenkins, were at .500 (29-29) but had designs on contending in the AL West. They sent righties Jim Bibby and Jackie Brown plus lefty prospect Rick Waits and $100,000 to Cleveland in exchange for Perry, who pitched well after coming over (12-6, 3.03 ERA). In fact, his 124 ERA+ made him the only Texas starter above preventing runs at a better-than-average clip, and the team actually finished with a worse record than the Indians (79-83 vs. 79-80).
The next year Martin managed the Yankees to the pennant. Bibby and Waits became useful pitchers in Cleveland. Perry pitched well in Texas for two more seasons, then became the oldest Cy Young winner (39) in San Diego in 1978. He finished his career in 1983 with 314 wins and 3,534 strikeouts. In '91, his third year of eligibility, he got a plaque in Cooperstown.