John Eugene O'Donoghue (born October 7, 1939) is an American former Major League Baseball left-handed pitcher.

During his nine-year major league career, O'Donoghue compiled 39 wins, 377 strikeouts, and a 4.07 earned run average.

[3] During his pitching career, O'Donoghue stood 6 feet 4 inches (1.93 m) tall and weighed 203 pounds (92 kg).

He gave up just two runs (one earned) in six innings, but was the losing pitcher as Jim "Mudcat" Grant and Cleveland prevailed, 2–1.

He pitched a one-hit complete game shutout at Tiger Stadium that day, striking out 11 and walking only two batters.

The Tigers had such players as Dick McAuliffe, Al Kaline, Willie Horton, Bill Freehan, Eddie Mathews, and Norm Cash in the lineup, but O'Donoghue was almost untouchable.

[11][12] O'Donoghue was traded along with Gordon Lund by the Indians to the Baltimore Orioles for Eddie Fisher and minor leaguers Johnny Scruggs and Bob Scott on November 28, 1967.

[13] In 1968, he split the season between the Orioles and their Triple-A International League affiliate, the Rochester Red Wings.

[1] In 1969, he began the year at Rochester,[5] and on April 30 was traded to the expansion Seattle Pilots with Tom Fisher and Lloyd Fourroux for Gerry Schoen and Mike Ferraro.

[1] During the 1969 season, in Ball Four Bouton quotes O'Donoghue saying on June 13, 1969, while "getting on the bus to go from the Biltmore Hotel to Yankee Stadium, 'Well, boys, here we start our tour of the funny farm.'

He was 9–18 with a 3.95 ERA in 34 games (30 starts);[1] the 18 losses tied him for the league lead with Boston Red Sox pitchers Bill Monbouquette and Dave Morehead.

[1] In 1969, the Baltimore Orioles presented the John O'Donoghue Long Ball Award to pitchers who had given up home runs after games.

Jim Palmer said it was named "in honor of the former Indian who had a tendency to throw fat pitches that ended up getting hit so hard they sometimes didn't land in the same county as the baseball park.

"[18] O'Donoghue held All-Stars Paul Blair, Tony Kubek, Roger Maris, Rick Monday, Boog Powell, Zoilo Versalles, and Roy White to a .140 collective batting average (19-for-136); and held Hall of Famers Luis Aparicio, Lou Brock, Frank Robinson, and Carl Yastrzemski to a .204 collective batting average (11-for-54).