Seager will undergo Tommy John surgery and will miss the remainder of the season.
To fill the vacant roster spot, the club recalled utility man Breyvic Valera from Triple-A Oklahoma City.
Valera, 26, will make his second stint with the big league club after making two pinch-hit appearances (0-for-1, BB) with the Dodgers this season. In 17 games with Oklahoma City this year, he has posted a .373 (19-for-51)/.459/.549 slashline with 13 runs, three doubles, two homers and 14 RBI, while also drawing nine walks against just eight strikeouts. The speedy utility man has seen the majority of his playing time at second base (nine games) with the OKC Dodgers, but has also seen time at shortstop (four games), third base (four games) and in left field (one game).
Seager, 24, has hit .267 with 13 runs, five doubles, one triple, two home runs and 13 RBI along with a .348 on-base percentage in 26 games with Los Angeles this season. He struggled with problems in his elbow for the final few months of the 2017 season, but was thought to be healed after prescribed rest over the winter.
(Dai Sugiura provided the majority of information furnished in this report)