Baseball Refence.com is wonderful. The Mets have twice scored 6 runs in an inning with 1 hit. Their stat guy looking to see if that had ever happened before, found an inning in 1959 when the A;s, (then in Kansas City), gave up 11 runs on one hit in an inning. I was able to find it within a minute:
Chicago White Sox beat Kansas City Athletics (20-6). Apr 22, 1959, Attendance: 7446, Time of Game: 3:12. Visit Baseball-Reference.com for the complete box score, play-by-play, and win probability
www.baseball-reference.com
It's the 7th inning: error, error, single with a third error, walk, steal, walk, walk, walk, groundout, walk, walk, walk, hit by pitch, walk, strike out, walk, walk, ground out. 10 walks, 3 errors, 1 hit batter, one single. They'd had a 6-1 lead at one point and lost 6-20. Manager's hair out.
The names: The White Sox had Hall of Famers Nellie Fox, Luis Aparico and Early Wynn. They won the pennant this year before losing to the Dodgers in the World Series. Johnny Callison and Norm Cash were great young prospects who went on to success with the Phillies and Tigers. For the A's this was Roger Maris' last year before joining the Yankees and winning the next two MVPs. he ahd a home run but also one of the errors. Whitey Herzog was in left field and the centerfielder was Bill Tuttle, who later had a stint with the Syracuse Chiefs before retiring in the mid-60's. later he became the poster child for what can happen when you chew tobacco and he died with cancer of the jaw.