I read a reasonable explanation for DiMaggio's late entry into the HOF. Although the Hall was started in 1936. 26 years earlier, the ballots still contained numerous future Hall of Famers, which made it more difficult to reach the 75 percent vote and failed to break the logjam. (Apparently Jimmy Foxx was another delayed entry, waiting for the ninth ballot). The problem was aggravated by the fact that the 5 year wait before becoming a candidate was not yet implemented, increasing the pool of candidates.

The Hall had a quota of how many could get in in any one year.

Bob Feller and Jackie Robinson.

Jackie Robinson, because he was Jackie Robinson, obviously. No way has she ever heard of Bob Feller.

Jackie Robinson and Roy Campanella

Stan the Man
Ted Williams

Although I could see Campy as well because of the way his career was cut short and his 3 MVPs. Obviously Williams was not a great friend of the press, but his numbers were overwhelming even if you don’t think about all the time lost to wars.

If the HOF had its 5 years retired rule at the time (not sure if they did), that would mean the two players last played in 1956. I'm going to keep rolling with Sandy Koufax as a guess because that's served me well recently. As for the other, Jackie Robinson is the only person that pops to mind who would fit within that window. Other stars I'm thinking of were either long retired or still playing (I think).

Jackie Robinson and Bob Feller.