SEATTLE (AP) — Mariners’ starter Bryan Woo left Friday’s game with one out in the fifth inning for precautionary reasons, according to the team.

Making his first start of the year after being slowed by a sore elbow during spring training, Woo allowed just one hit through the first four innings only to leave the game after getting Tyler Soderstrom to foul out behind third base to open the fifth.

Catcher Cal Raleigh immediately went to the mound and was quickly joined by pitching coach Pete Woodworth and manager Scott Servais. Woo eventually walked off the mound alongside athletic trainer Kyle Torgerson and was replaced by Trent Thornton.

The team said an update on Woo would be provided after the game.

Woo was expected to be the No. 5 starter in Seattle’s rotation entering the season before the elbow soreness emerged in spring training. Woo didn’t allow an earned run in 11 1/3 innings over three rehab outings with Triple-A Tacoma.

Last season, Woo was 4-5 with a 4.21 ERA in 18 starts with the Mariners.