It took a little digging, but I finally found when this picture was taken: August 16, 1925 – it’s the only game I could find where Gehrig scored, Nallin was umpiring home plate, and Hank Severeid was catching in Washington.
I had never heard of Lou Gehrig referred to as “Buster” before, but check out the following game recap from the Washington Reporter, August 17, 1925:
I know it’s hard to read, but trust me, it says:
“Yesterday’s hero – “Buster” Gehrig, Yankee first baseman, accounted for two runs with a homer, a double, and two singles and beat the Senators 3 to 2.”
NOTE: The Library of Congress misnames the umpire in the photo as “Umpire Nallan.” In actuality, the umpire is Dick Nallin, who umpired in the Major Leagues for 17 years (1915-1932). He also coached the Villanova University Football team to a respectable 7-2-1 record in 1899.