Let's discuss regression.
To date Rafael Devers has posted a wRC+ of 79 and 0.2 fWAR in 232 plate appearances.
To date Yankee infielder Gleyber Torres, who is 50 days younger than Devers, has posted a wRC+ of 162 and 1.4 fWAR in 130 plate appearances.
ZiPS, Steamer and FanGraphs Depth Charts project Devers with rest-of-season wRC+/WAR of 101/1.3, 101/1.2 and 101/1.4, respectively.
https://www.fangraphs.com/statss.aspx?playerid=17350&position=3B
ZiPS, Steamer and FanGraphs Depth Charts project Torres with rest-of-season wRC+/WAR of 111/1.1, 99/1.1 and 105/1.5 , respectively.
https://www.fangraphs.com/statss.aspx?playerid=16997&position=2B
Despite vastly contrasting starts, Devers and Torres are projected with similar production the remainder of the season. The Red Sox and Yankees should be patient with their promising 21-year-olds.