"He's going down the line 100 percent and moving good on defense," Melvin said. "Next up for him is to get multiple-hit games back-to-back."

Nakajima's rehab assignment can only last until May 23, at which point he'll either have to be placed on the active roster or assigned to the minor leagues. He's recovering from a left hamstring injury.

Nakajima will take Wednesday off and then play four games in a row. He's gone 7 for 29 (.241) overall with the River Cats. 

"From everything that I hear, he's getting more and more comfortable, not only in the field but at the plate," manager Bob Melvin said. "We want to make sure he gets plenty of at-bats and plays plenty of games to where he doesn't have to feel the hamstring."

The team expects Nakajima to need a few more days of work before it considers activating him. He is likely to work as a utility play upon returning to the majors. 

Nakajima is expected to play nine innings for Triple-A Memphis on his rehab assignment Tuesday. He had missed the previous three days due to tightness in his injured hamstring. 

He is expected to head to Triple-A Memphis to play nine innings for the River Cats Tuesday. Nakajima missed the last three days with the issue. 

Nakajima went 2 for 4 with a double and RBI in his only rehab game.