Brinson, Prado expected to be among September callups when the roster expands.

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MIAMI — When rosters expand from 25 to 40 next week, Lewis Brinson and Martín Prado are expected to be back with the Marlins.

Both players have been on the disabled list, but are close to returning. On September 1, MLB teams are allowed to bump their active roster up to 40 players for the remainder of the regular season.

With the added spots, Marlins manager Don Mattingly said he expects both players to be among those added to the active roster.

Miami’s Opening Day starter in centerfield, Brinson has been on the DL since July 4. Initially called a right hip inflammation, the 24-year-old was later diagnosed with a right hip bone bruise.

Brinson began his rehab stint in Double-A Jacksonville on Aug. 14, playing eight games with the team. During that stretch, he went 3 for 23 with a home run. On Saturday, the Coral Springs High School alum was moved to Triple-A New Orleans and went 2 for 5 with a double in his first game.

“It’s not always that you’re looking for results in a rehab type scenario,” Mattingly said. “It’s about them getting timing, getting comfortable — you can get 12 to 14 at bats and be okay. But if you get 25 to 30, you should be ready. It’s basically what you’re getting in almost a Spring Training. You’re getting 50 in spring, but now he’s got a bunch under his belt.”

Brinson struggled early in his rookie campaign, but began showing signs of improvement before injuring his hip. After hitting .139 in April and .137 in May, he posted a .267 average the ensuing month. Mattingly is hoping Brinson can see 100 at bats in the final month of the season.

Prado has been on the DL since Aug. 13 after straining his left quad during a doubleheader at Atlanta. The third baseman began increasing his running and baseball activity earlier this week. Mattingly said Prado would likely play in a simulated game — as opposed to a rehab start — before returning.

The 34-year-old is hitting .244 with one home run and 15 RBI. Earlier this season, Prado spent six weeks on the DL with a strained left hamstring.