Who was the first pitcher with 20 strikeouts in a game with fewer than 10 IP?

Roger Clemens becomes the first pitcher in MLB history to strike out 20 batters in a nine-inning game.

Interpreted as:
Who was the first pitcher with 20 or more strikeouts in a game with fewer than 10 IP?
NAMEDATETMOPPDECSOIPGSCGGFSHOSVHTBFRERHRBBIBBHBPWP
1Roger Clemens
Roger Clemens
4/29/1986
W
20
9.0
1
1
0
0
0
3
30
1
1
1
0
0
0
0
2Roger Clemens
Roger Clemens
9/18/1996
W
20
9.0
1
1
0
1
0
5
32
0
0
0
0
0
0
1
3Kerry Wood
Kerry Wood
5/6/1998
W
20
9.0
1
1
0
1
0
1
29
0
0
0
0
0
1
0
4Randy Johnson
Randy Johnson
5/8/2001
20
9.0
1
0
0
0
0
3
29
1
1
0
0
0
0
0
5Max Scherzer
Max Scherzer
5/11/2016
W
20
9.0
1
1
0
0
0
6
33
2
2
2
0
0
0
0
Results may be incomplete. StatMuse has complete game-level data for innings pitched and strikeouts going back to the 1908 season.
Some of the information used here was obtained free of charge from Retrosheet.

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