Wally Berger with the Giants in 1937/1938
Very forgotten player who was an above average ball player.
Through 2022, he was the only player before the 21st century and one of only five players to hit 20 or more home runs in their rookie year before July (1930). And wasn't done again until pujols did it in 2001, 71 years later. Wally hit 38 that season as a rookie.
His career was only a decade long (really only 9 years) And ruined by shoulder and hand injuries. His stat sheet is quite impressive and makes you wonder if he could've been a 500/3000 hitter if he got to play for another 10 years. One of the original what ifs in the game.