Woo (hamstring) threw 45 pitches and allowed two runs on a hit with two walks and two strikeouts over 2.2 innings during his rehab start with High-A Everett on Saturday, Daniel Kramer of MLB.com reports.

EDGE Analysis

The 24-year-old rejoined the Mariners on Sunday, but manager Scott Servais was non-committal on whether the right-hander will require an additional rehab outing. The club wants Woo to be able to cover at least four or five innings before being reinserted into the big-league rotation, so it wouldn't be surprising if he's sent on another rehab outing to further build up his workload before being activated.

Woo (hamstring) will begin a rehab assignment with High-A Everett this weekend, Daniel Kramer of MLB.com reports.

EDGE Analysis

Woo came out of a bullpen session Wednesday with no concerns, clearing the way for him to make a rehab start. Mariners manager Scott Servais wouldn't rule out a return before the All-Star break for Woo, so it sounds like the right-hander could need just the one rehab outing if all goes well.

The Mariners placed Woo on the 15-day injured list Tuesday with a right hamstring strain, Shannon Drayer of SeattleSports.com reports.

EDGE Analysis

It's being classified as a low-grade strain, so perhaps Woo has a chance to return when his 15 days are up or shortly after. Emerson Hancock would normally be the obvious candidate to step into the Mariners' rotation in Woo's place, but his status is unclear after he exited his last start at Triple-A Tacoma with lower-back tightness. Jhonathan Diaz, who's struggled at the big-league level this season (5.06 ERA, 1.88 WHIP) but has an 8-1 record and 3.26 ERA at Tacoma, is another candidate.

Woo was removed from Monday's game against the Rays due to right hamstring tightness.

EDGE Analysis

Woo left his start with the team trainer after suffering what looked to be a right leg injury, and he's since been diagnosed with a hamstring issue. The team should have a better idea of whether he'll require a trip to the injured list after further evaluation, and he's set to undergo an MRI on Tuesday, per Daniel Kramer of MLB.com.

Woo left Monday's contest in the fourth inning due to an apparent right leg injury, Shannon Drayer of SeattleSports.com reports.

EDGE Analysis

Woo pitched three scoreless innings, allowing four hits while striking out three batters to open his outing Monday. He then surrendered a leadoff single to Richie Palacios in the bottom of the fourth inning and was removed thereafter with a right leg injury. Woo was visibly upset after tweaking something in his leg and a more exact diagnosis will likely come in the near future.

Woo (3-1) took the loss to the Guardians on Wednesday, allowing three runs on four hits and one walk with one strikeout over four innings.

EDGE Analysis

Woo struggled early, allowing an RBI single by Josh Naylor in the first inning and a two-run home run by Steven Kwan in the second. He rebounded with two scoreless innings but was pulled after just 64 pitches with a 3-0 deficit. Considering he hasn't pitched since June 6 with a forearm injury, the Mariners were likely just being cautious with Woo's workload. Woo still owns a sparkling 1.67 ERA and 0.61 WHIP in 37.1 innings, but his current 5.97 K/9 is well below his 9.55 rate last season. He tentatively lines up to face the Rays early next week.

Woo (forearm) is expected to start Wednesday on the road against the Guardians, Adam Jude of The Seattle Times reports.

EDGE Analysis

Woo was forced to miss his last scheduled start Tuesday versus the White Sox due to right forearm discomfort, but after a clean MRI, he appears set to return to the mound in Cleveland. The 24-year-old has produced a sparkling 1.07 ERA and 0.53 WHIP while striking out 24 batters over 33.2 innings in six starts this season.

Mariners general manager Justin Hollander said Wednesday that the MRI on Woo's arm "was perfectly clean," and the right-hander could be reinserted into the rotation as early as next week, Daniel Kramer of MLB.com reports.

EDGE Analysis

The 24-year-old was scratched ahead of his scheduled start Tuesday against the White Sox due to what the team labeled as a "right forearm issue," but he doesn't appear to be dealing with anything too serious. It's unclear when exactly Woo will make his next start, though it seems the Mariners will attempt to avoid putting him on the injured list.

Woo was scratched from his scheduled start Tuesday against the White Sox as the Mariners await MRI results on his right arm, Adam Jude of The Seattle Times reports.

EDGE Analysis

The right-hander missed the first six weeks of the season with elbow inflammation and is now potentially dealing with another arm issue a month later. Woo has been dominant in six starts for Seattle with a 1.07 ERA, 0.53 WHIP and 24:2 K:BB over 33.2 innings, but his outlook is now up in the air as he continues to be evaluated.

Woo will not start Tuesday's game versus the White Sox, Shannon Drayer of Seattle Sports 710 AM reports.

EDGE Analysis

The Mariners have not yet said why Woo won't start as scheduled Tuesday, but an update on his status should come in the near future. In the meantime, Jhonathan Diaz will come up from Triple-A Tacoma to start in Woo's place.