Friday July 2, 1948
In a footnote to the Nats’ 2-1 extra-innings win over the Yankees in the Bronx, Tom McBride set a league mark by making either 11 or 12 putouts in left field over the course of the 12-inning game.
The New York Times had 11 putouts listed for McBride, and there was (unsurprisingly) no mention of the record in James P. Dawson’s write-up of the game.
Charlton’s Baseball Chronology, accessed at baseballlibrary.com, records McBride’s total as 12 for the afternoon, saying that it was an AL record for putouts in left field in an extra-inning game. I can find no listing for that particular record, but I do know, thanks to baseball-almanac.com, that the current nine-inning record for left field putouts is shared by Willie Horton and Paul Lehner, who each had 11 in a single game (Horton in 1969, Lehner in 1950).
For what it is worth, Lyman Bostock shares the record for center field putouts with Jacoby Ellsbury, each having recorded 12 in a game. Bostock did it on May 25, 1977 in the second game of a doubleheader at Fenway Park.
McBride also figured prominently in the offense that day. His walk in the seventh inning pushed the eventual tying run to second. The runner, Carden Gillenwater, moved to third on a sacrifice fly, then scored on another. The game was won when Gillenwater hit a home run off of Tommy Byrne in the top of the 12th inning.
Walt Masterson was the fly-ball inducing pitcher who, according to the boxscore in the NYT, recorded 20 of his 36 total outs on outfield fly balls.