Mariners' Kyle Lewis has setback in rehab from knee injury

The Mariners were hopeful that reigning Rookie of the Year Kyle Lewis would begin a rehab assignment on Friday, but those plans were dashed by soreness in his surgically repaired right knee, per The Athletic’s Corey Brock. Lewis went under the knife in June after just 147 plate appearances. His offense was down a little to a .246/.333/.392 triple slash line, but even ignoring the small-sample caveat, that’s still good for a 107 wRC+.

Lewis’ delay is unfortunate, especially given the struggles of Jarred Kelenic in center.  Jake Fraley and Taylor Trammell have helped out in center as well, but Fraley is on the injured list and Trammell is in Triple-A. Somewhat improbably in the playoff hunt, the Mariners could certainly use better than the 50 wRC+ that Kelenic is providing, but given this latest setback for Lewis, any improvement will likely have to come from Kelenic himself. 

In other news…

• The Mariners expect bullpen reinforcements soon. Diego Castillo and Anthony Misiewicz are on their way back from the injured list, per Ryan Divish of the Seattle Times. Misiewicz has been one of their more reliable relievers on the season, and Castillo was intended to take over the closer role when he was acquired at the deadline. Paul Sewald has claimed that job for now, so it will be worth watching where manager Scott Servais chooses to work Castillo back into the mix.
• Lucas Giolito’s hamstring strain might ultimately be a good thing for the big righty. A short stint on the injured list will allow him to reset and adjust some of his mechanics, per Bruce Levine of 670 The Score. On finishing his delivery, Giolito said, “When my finish gets violent, I am recoiling on the pitch and my leg stiffens out. It’s almost like I am falling backwards. I don’t want to be there. It’s a bad habit. When I am strong on my front leg, even with a little bend, it allows me to get through the pitch, which leads to more extension going forward. I feel I am more consistent when I am more athletic and stronger through my finish.”