Upon further research, I discovered that Jim Maloney was the first pitcher in modern baseball history to hurl no-hit ball for 10 or more innings twice in the same season.
On June 14, 1965, Maloney did not allow a hit for ten innings against the New York Mets. He lost his no-hitter when Johnny Lewis led off the top of the 11th with a home run. Roy McMillan also singled later in the inning. Maloney struck out 18 batters and only walked one in the 1-0 heartbreaker.
On August 19, 1965, Maloney tossed a complete-game, 10-inning no-hitter vs. the Chicago Cubs at Wrigley Field. Leo Cardenas hit a game-winning HR off the left-field foul pole in the top of the 10th before Maloney polished off the Cubs in the bottom half of the inning to secure the 1-0 victory. The final frame was the only one in which the 6'2", 200-pounder failed to strike out a batter. The Cincinnati ace threw 187 pitches--including 14 full counts--while fanning 12 and walking 10.
In addition to the three no-hitters, Maloney hurled five one-hitters and nine two-hitters during his career. The flamethrower also pitched six innings of no-hit ball against the Los Angeles Dodgers in 1964 (before leaving with a pulled muscle), and he retired all 19 batters vs. the Pittsburgh Pirates in 1967 (exiting with an injured ankle).
On April 16, 1970, Maloney severed the Achilles tendon in his left leg while running the bases against the Dodgers. Maloney's career effectively ended right then and there as the 29-year-old never won another game in the majors.