Figgins was taken out of Monday's game in the third inning after aggravating a hip flexor that had been nagging him in recent days.
Figgins said the muscle began bothering him over the weekend when he played all three games against Tampa Bay, then got worse on a play in the first inning Monday night against the A's.
"It doesn't feel bad enough to where I can't play, it's just my legs are part of my game, especially on defense at third," he said after Monday's 8-4 win. "You need to be able to move."
Figgins said he'd had similar problems a couple months ago, "but it got better, because I wasn't playing."
This has been a trying season for the 33-year-old infielder. He's hitting just .188, though he'd shown modest signs of life recently with a four-game hitting streak that included a single and run scored in the first inning Monday.
"I had been hitting the ball better before, then they decided to stop playing me," Figgins said. "I told myself to stick with my same approach and I've been doing pretty well, I just haven't been in much."
Now he'll be off at least 15 days, with Seager rejoining the team for his second stint. Seager hit just .136 (3-for-22) in seven games with the Mariners in July, but the 23-year-old was batting .387 in 106 at-bats at Tacoma since his midseason promotion.
Seager has hit safely in 10 of his last 12 games since returning to Tacoma, batting .321 (17-for-53) with 10 runs scored, one home run and five RBIs.
With Adam Kennedy tailing off recently and the club taking a good look at its young prospects, Seager could get more opportunities now. Kennedy has hit just .189 (17-for-90) since June 29, as his average has dipped to .245.