"It will be the type of pitchers or the match-up," Torre said.
Anderson started Friday night against D-backs starter Edwin Jackson. Johnson has the better numbers against Saturday night starter Rodrigo Lopez and Anderson has the better numbers against Sunday starter Dan Haren.
On the season, however, Johnson is batting .281 while Anderson has struggled to a .180 average, which includes an 0-for-5 tab on Wednesday with four strikeouts.
Johnson, however, struggled in his start against the Giants.
"Not too good," Torre said. "He was even making fun of himself. And he took a foul ball [from Ronnie Belliard while in the on-deck circle] as an add-on. He's jumping at it again. It looks like he's trying to pull the ball. That's why he was out here today taking extra hitting, with the roof open, and that was really nice."
If Ramirez goes on the disabled list, the most likely call-up would be Xavier Paul.