23 by 23

No matter how Mike Trout’s career ends up, he will always have a good argument for being the best young position player the game has ever seen. He’s already got more fWAR through his age 22 season than anybody else, and now he’s on the verge of accumulating the most rWAR too.

22+ WAR in Their Age 22 Season
Player From-To Age rWAR fWAR G PA
Ty Cobb 1905-1909 18-22 25.5 25.9 595 2486
Mike Trout 2011-2014 19-22 25.4 26.6 416 1852
Ted Williams 1939-1941 20-22 23.6 24.8 436 1942
Mel Ott 1926-1931 17-22 23.5 25.1 677 2644
Alex Rodriguez 1994-1998 18-22 22.9 20.8 513 2271