ANAHEIM – Dodgers shortstop Corey Seager received an initial diagnosis of a Grade 2-plus strain of his left hamstring he suffered while running the bases in the ninth inning of Tuesday night’s 5-3 loss to the Angels.

Seager will undergo an MRI on Wednesday for verification, but the Dodgers are expected to lose him for four to six weeks, just when Seager was beginning to look like his All-Star self after a slow start coming off elbow and hip injuries that sidelined him for most of 2018.

“I hesitate to put a number on it, but 2-plus,” said manager Dave Roberts. “Obviously, very unfortunate, the way that he’s playing and what he means to our ballclub. With what he’s done to overcome two surgeries and get into good playing shape. He’ll get back on the rehab trail and we’ll get him back as soon as we can.”

The 25-year-old Seager, on base for the fourth time, led off the inning with a single and was wild pitched to second base. Alex Verdugo singled up the middle and Seager was about to round third when he grabbed the back of his left leg and pulled up just past the bag. He left for pinch-runner Kyle Garlick.

“Just coming around third, it grabbed pretty good,” said Seager. “Gonna get it checked out tomorrow, see where we're at.”

Seager, who also made two long runs to catch pop flies while the defense was in a shift, said he didn’t feel any signs of an oncoming problem.

“No, just kind of one bad step, I guess,” he said. “This one kind of came out of nowhere.”

Seager was playing his best ball of the season. In the last two weeks, he had raised his average from .238 to .278 after going 3-for-4 with a walk against the Angels.