Harper ended April with a bases-clearing double against reliever Jack Leathersich during an 8-2 victory over the Mets on Thursday night at Citi Field.
While he has been productive during the first month of the season, Harper wants to be injury-free. The last two years, Harper has missed a combined 106 games because of injuries.
"Hopefully, I keep going. That's all I want to do," Harper said. "I just want to stay in the lineup, stay healthy all year and hopefully play 150, 160 games. That's all I care about. As long as we are winning ballgames, it's huge for us. I love playing in April. I don't know why. I'm very comfortable in April. Hopefully, I can feel comfortable the next five months, too."