Oakland Athletics manager Bob Melvin says slugger Khris Davis is making progress after straining his left calf.

Melvin says the designated hitter and outfielder was able to take more at-bats Sunday. 

“I think when we get back we’ll be pretty close to getting him in games,” Melvin said. “He and I talked yesterday about trying to get a week’s worth of games in. We’re coming up on that pretty soon and I think that’s probably a fair assessment for a timetable for him.”

Davis has been stepping up his rehab and began running on the field Friday.

The major leagues’ home run leader last season with a career-high 48, Davis has been able to work on his swing even if he can’t get into games.

The Athletics open the regular season against the Seattle Mariners on March 20 and 21 at the Tokyo Dome.