Johnson, who was called up from Triple-A Durham on Wednesday, has a .293 career batting average with three home runs in 13 games at Fenway Park.
"I feel like I see the ball really well here," Johnson said. "I love Fenway Park, just the history of this stadium."
Will manager Joe Maddon look to Johnson in the late innings to pinch hit if needed?
"Depends on the situation," Maddon said. "We have certain guys we pinch hit for. [I] have to look at how they utilize their bullpen."
With Sam Fuld unavailable for pinch hitting duties due to a strained tendon in his right wrist, Johnson's chances of being used as a pinch hitter are even greater.
"He's ready to go. ... He'll be fine if the right situation comes up, he'll be out there," Maddon said.