The Yankees have made a hard right turn away from their historic way of building an offense.

Suddenly, their power is coming mainly from the right side. That has been motivated by three factors:

1. The prospects they have promoted – Tyler Austin, Aaron Judge and, most notably, Gary Sanchez – are righty.

2. They traded Carlos Beltran and have minimized the roles of Brian McCann and Mark Teixeira.

3. They have recognized that the volume of shifts has robbed so much batting average from their lefty hitters, especially at home, that constructing a lineup full of lefty pull power guys to take shots at the short right-field porch no longer carries the long-standing benefits enjoyed by Ruth and Gehrig, Maris and Mantle, Reggie and Cano.

“In this new age with the shift, it waters down your home-field advantage,” said Brian Cashman, who also obtained two top righty-hitting prospects at the trade deadline, Gleyber Torres and Clint Frazier. “There is not as much benefit as there used to be. What is more beneficial is a fluid, flexible offense, whether righty or lefty.”

To underscore how righty the Yankees have become with their power, they managed just 34 homers from righty batters over the first four months of the season, which ranked 29th out of 30 teams. In August, they have 22 righty homers, fifth most in the majors. On Monday night in Seattle, Sanchez and Starlin Castro each homered twice. That was the first time the Yankees had multiple homers from two righty swingers in the same game since Aug. 27, 2006 – Derek Jeter and Bernie Williams (a switch-hitter who hit both homers batting righty).

The last time it occurred in a Yankees loss like Monday’s was April 21, 1990, when Mike Blowers and Dave Winfield did it.

Josh Reddick is the Jay Bruce of the Dodgers.

Both lefty-hitting right fielders were obtained at the Aug. 1 trade deadline and have been among the game’s worst hitters since.

Among the 149 players with at least 65 plate appearances since they debuted with their new teams, Reddick (.149) has the majors’ worst average and Bruce (.169) has the fifth worst. Reddick’s OPS (.373) was the worst in that span and Bruce’s (.544) was ninth worst.

Like the Mets believe Bruce is pressing with a new team, Dodgers people say Reddick’s swing has gotten long as he has tried to justify Los Angeles giving up three prospects for him and Rich Hill. Due to a continuing blister issue, Hill has yet to start for the Dodgers (his debut is scheduled Wednesday).

The Dodgers have somehow climbed into first place in the NL West, though Clayton Kershaw has not started since June 26 and they have received negative results from their big deadline trade. They are hoping to have Kershaw back in September. Imagine if they also get something positive from Reddick and Hill.