"I'm sure that was a big boost," McClendon said. "He pitched a real good game last night. And really, you could argue that he probably should have shut them out [if not for a misplayed line drive by James Jones in center field]. He did very well."
With Walker back in the rotation, James Paxton nearing his return and Ramirez pitching better, the Mariners' depth is improving behind Felix Hernandez, Iwakuma, Chris Young and Roenis Elias.
"We're getting there," McClendon said. "I know it's an old cliché, but it's true. You just never have enough pitching. During the course of the year, you're going to need probably eight or nine starters. If you look at the track record of most teams, year in and year out, you do go to that seventh and eighth starter a lot. We're no different."
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB as well as his Mariners Musings blog. This story was not subject to the approval of Major League Baseball or its clubs.