SEATTLE -- Luis Urias ' first taste of the big leagues appears to have come to an abrupt and painful end.

The Padres' 21-year-old second-base prospect, ranked No. 4 in the club's system by MLB Pipeline, pulled his left hamstring during the eighth inning of a 2-1 victory on Tuesday night in Seattle. He sustained the injury while trying to leg out an infield grounder, and afterward manager Andy Green noted it's "doubtful" that Urias returns this season.

"I don't think it looks particularly good, given the amount of time we have left in the season," Green said. "We'll see how he responds to treatment. Hopefully it's nothing big, but he's doubtful at this point in time."

Urias, the top-ranked second-base prospect in baseball, earned his callup last month and went 10-for-48 with two homers in his debut season.

Despite the relatively slow start, the Padres came away with an extremely positive first impression of Urias -- if, indeed, his season is finished.

"There's a lot to like," Green said. "He's really defended the field. He's looked so good at second base, made a diving play almost every time he's had a chance to. They've been big plays. And he's turned double plays well.

"At the plate, I don't think he really found his rhythm or his stride, but you don't read too terribly much into that. He had some good swings at times. The numbers aren't going to be what he'd want them to be for his first short stint in the big leagues. But I don't think anybody's too concerned. He's got a long track record."

Facing Mariners right-hander Alex Colome in the eighth, Urias bounced a chopper to first base. In his attempt to beat Colome to the bag, he lunged with his left leg one stride before reaching the base. That's when he came up hobbling.

Urias was escorted off the field with the help of Green and team trainer Mark Rogow. Cory Spangenberg entered at second base in his place.

Spangenberg and Jose Pirela are both options to take over for Urias at second over the next three weeks. Another possibility would see shortstop Freddy Galvis slide to second with the newly recalled Javy Guerra getting a look at short.

In any case, the Padres were pleased to have gotten a look at Urias, however brief it may have been.

"We valued his opportunity to come up and play in the big leagues, because, one: he had earned that opportunity, and two: he's a big part of what we plan on doing going forward," Green said.